Artículos científicos

URI permanente para esta colecciónhttps://repositorio.inia.gob.pe/handle/20.500.12955/8

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Mapping current and future coffee suitability in Peru under climate change: implications for restoration and deforestation-free development
(Frontiers Media S.A, 2026-04-20) Zabaleta Santisteban, Jhon A.; Rojas Briceño, Nilton B.; Silva López, Jhonsy O.; Medina Medina, Angel J.; Tuesta Trauco, Katerin M.; Rivera Fernandez, Abner S.; Silva Melendez, Teodoro B.; Grandez Alberca, Marlen A.; Puscan Rojas, Julio; Salas López, Rolando; Oliva Cruz, Manuel; Cotrina Sanchez, Alexander; Gómez Fernández, Darwin; Barboza, Elgar
Coffee cultivation is central to rural livelihoods and Andean–Amazonian landscapes in Peru; however, it faces increasing pressure from climate change and land-use restrictions. This study aimed to assess the current and future ecological suitability of Coffea arabica at the national scale. A Maximum Entropy (MaxEnt) modeling framework was applied, integrating high-resolution bioclimatic, topographic, and edaphic variables. Model performance was robust (mean AUC = 0.858), and variable importance was evaluated using jackknife tests and contribution metrics. Elevation, precipitation of the driest quarter (bio17), soil nitrogen content, and bulk density were identified as the main determinants of habitat suitability. Under current climatic conditions, highly suitable areas cover 42,322.95 km2 (3.3% of Peru), mainly along the eastern Andean slopes. Spatial exclusion scenarios revealed a pronounced funnel effect in effective land availability, with reductions exceeding 80% when forest-cover constraints were applied. Approximately 39.8% of highly suitable areas overlap with degraded lands, highlighting opportunities for productive restoration through agroforestry systems. Future projections under SSP1–2.6 to SSP5–8.5 scenarios indicate consistent contractions of highly suitable areas (–23% to –42%) and an upslope shift toward higher elevations, while unsuitable areas expand by 4%–5% nationally. These findings provide spatially explicit evidence to support climate-smart territorial planning, restoration prioritization, and sustainable coffee development under accelerating climate change.
Spatial analysis of soil acidity and available phosphorus in coffee-growing areas of Pichanaqui: Implications for liming and site-specific fertilization
(MDPI, 2025-07-28) Quispe Matos, Kenyi Rolando; Hermoza Ayme, Nilton Alexander; Mejia Maita, Sharon Yahaira; Romero Chávez, Lorena Estefani; Ottos Díaz, Elvis; Arce, Andrés; Solórzano Acosta, Richard
Soil acidity is one of the main limiting factors for coffee production in Peruvian rainforests. The objective of this study is to predict the spatial acidity variability for recommending site-specific liming and phosphorus fertilization treatments. We analyzed thirty-six edaphoclimatic variables, eight methods for estimating liming doses, and three geospatial variables from 552 soil samples in the Pichanaqui district of Peru. Multivariate statistics, nonparametric comparison, and geostatistical analysis with Ordinary Kriging interpolation were used for data analysis. The results showed low coffee yields (0.70 ± 0.16 t ha⁻¹) due to soil acidification. The interquartile ranges (IQR) were found to be 3.80–5.10 for pH, 0.21–0.87 cmol Kg⁻¹ for Al⁺³, and 2.55–6.53 mg Kg⁻¹ for available P, which are limiting soil conditions for coffee plantations. Moreover, pH, Al⁺³, Ca⁺², and organic matter (OM) were the variables with the highest accuracy and quality in the spatial prediction of soil acidity (R² between 0.77 and 0.85). The estimation method of liming requirements, MPM (integration of pH and organic material method), obtained the highest correlation with soil acidity-modulating variables and had a high spatial predictability (R² = 0.79), estimating doses between 1.50 and 3.01 t ha⁻¹ in soils with organic matter (OM) > 4.00%. The MAC (potential acidity method) method (R² = 0.59) estimated liming doses between 0.51 and 0.88 t ha⁻¹ in soils with OM < 4.00% and potential acidity greater than 0.71 cmol Kg⁻¹. Regarding phosphorus fertilization (DAP), the results showed high requirements (median = 137.21 kg ha⁻¹, IQR = 8.28 kg ha⁻¹), with high spatial predictability (R² = 0.74). However, coffee plantations on Ferralsols, with Paleogene parental material, mainly in dry forests, had the lowest predicted fertilization requirements (between 6.92 and 77.55 kg ha⁻¹ of DAP). This research shows a moderate spatial variation of acidity, the need to optimize phosphorus fertilization, and an optimal prediction of liming requirements using the MPM and MAC methods, which indicate high requirements in the southwest of the Pichanaqui district.
Morphometric variation and production constraints of Criollo sheep in the high Andes of southern Peru
(MDPI, 2025-08-31) Estrada Cañari, Richard; Guelac Mori, Elias; Pedemonte Cruz, Cristian Wilmer; Chiqui Condori, Katherine Milagros; Montero Pacherres, Javier Klinsmann; Cerdan Ramos, Dilser Alberto; Zúñiga Aranibar, Dayana Milagros
This study aimed to characterize the morphometric traits and production systems of Criollo sheep in the highlands of Caylloma, Arequipa, Peru. A total of 455 sheep were evaluated using a stratified proportional sampling method across the districts of Tisco, San Antonio de Chuca, and Yanque. Morphometric data were collected under standardized conditions, and nine zoometric indices were calculated to assess functional conformation and productive aptitude. Additionally, 52 sheep producers were surveyed to contextualize herd management practices. Results revealed low levels of formal education and limited technical assistance among producers. Sheep farming was primarily sustained by family tradition, with declining flock sizes attributed to pasture scarcity and climatic challenges. Campaign-based sales strategies and rudimentary reproductive management were prevalent. Health practices showed widespread deworming but limited preventive care. Multivariate analysis indicated significant morphometric variation linked to sex, biotype, and dental stage. This integrative approach highlights both the adaptive potential and production constraints of Criollo sheep in high-altitude environments, providing a basis for developing breeding strategies based on morphometric indices.
Predictive modeling of honey yield in rural apiaries: insight from Chachapoyas, Amazonas, Peru
(MDPI, 2025-11-18) Briceño Mendoza, Yander Mavila; Saucedo Uriarte, José Américo; Quiñones Huatangari, Lenin; Gaslac Gomez, Jhoyd B.; Quispe Ccasa, Hurley Abel; Cayo Colca, I.S.
Honey production is influenced by multiple factors, including climatic conditions, hive management practices, and harvest scheduling. This study evaluated the predictive capacity of statistical modeling techniques using data mining algorithms (MARS, CHAID, CART, and Exhaustive) and artificial neural network algorithms (Multilayer Perceptron, MLP) to estimate honey yields in apiaries located in northeastern Peru. A structured survey was conducted with sixty-nine beekeepers across nineteen districts in the Chachapoyas province. Variables included beekeeper experience, instruction, hive count, visit frequency, harvest frequency, additional income-generating activities, and geographic location. Descriptive statistics, non-parametric tests, Spearman correlations, and exploratory factor analysis were applied to identify latent structures. A linear mixed-effects model was used to assess the combined influence of predictors on honey production, with district included as a random effect. Results indicated that hive number, beekeeping experience, harvest frequency, and exclusive engagement in apiculture were statistically associated with increased honey yields. The model explained a substantial proportion of variance, supporting the integration of technical and socio-demographic variables in production forecasting. These findings demonstrate the utility of predictive modeling for informing hive management strategies and improving the operational efficiency of small-scale beekeeping systems in Andean regions.
Motility performance of thawed spermatozoa of bulls from the tropics throughout the year
(Animals, 2025-08-21) Poclín Rojas, Annie Yoselin; Arbaiza Barnechea, Martín Daniel; Segura Portocarrero, Gleni Tatiana; Ampuero Trigoso, Gustavo; Bernilla Carrillo, Diana; Depaz Hizo, Benjamín Alberto; Vásquez Tarrillo, Ronald Will; Diaz Quevedo, Clavel; Quispe Ccasa, Hurley Abel
Under tropical conditions, seasonal variations may also influence the sperm characteristics of Bos indicus. The objective was to evaluate the motility of thawed sperm of bulls from the Peruvian tropics throughout the year. Over 24 months, 129 ejaculates were evaluated based on semen quality and subjected to slow horizontal freezing in 0.5 mL straws. After thawing, the individual, seasonal period, and season effect on motility and kinetic parameters were analyzed using a Sperm Class Analyzer® (Microptic S.L.U., Barcelona, Spain). There was an individual effect on volume, motility, fresh concentration, and kinetic parameters when thawed. In the dry period, higher straight-line velocity (VSL) (p < 0.05) and beat cross frequency (BCF) were found than in the rainy period (p < 0.01). In summer and autumn, there was greater total motility, fast, circular routes, curvilinear velocity, average path velocity, VSL, amplitude of lateral displacement of the head, and BCF (p < 0.01). Greater volume and motility were found in winter and spring, but in summer and autumn, greater speed and vigor of movement were obtained in thawed sperm. The variation in annual climate patterns influences the seminal quality of bulls, and its effect needs to be assessed to propose adaptation strategies to climate change in tropical areas.
Genomic characterization of Peruvian Creole goats: insights into population structure and runs of homozygosity
(Animals, 2025-09-02) Corredor Arizapana, Flor Anita; Godoy Padilla, David José; Sessarego Dávila, Emmanuel Alexander; Temoche Socola, Victor Alexander; Paredes Chocce, Miguel Enrique; Escobar Robledo, Héctor Manuel; Ramírez Antaurco, Máximo Fabricio; Burgos Paz, William; Ruiz Chamorro, José Antonio; Cruz Luis, Juancarlos Alejandro; Mulim, Enrique A.; Rojas de Oliveira, Hinayah
Peruvian Creole goats (PCGs) represent a unique genetic resource shaped by adaptation to diverse environments and traditional breeding practices. In this study, we performed a genomic analysis of six regional populations (Ancash, Ica, Lambayeque, Lima, Piura, and Tumbes) using high-density SNP genotype data. Principal component analysis revealed a moderate genetic structure, with the Ica population showing clear separation and northern populations exhibiting overlap. Runs of homozygosity were predominantly short, and specific regions on chromosome 6 were shared across populations. Inbreeding coefficients were generally low, with Ancash showing the highest values. Linkage disequilibrium decayed rapidly over genetic distance, especially in Piura, indicating higher genetic diversity. Estimates of effective population size revealed decreasing trends across populations, with Piura maintaining the largest recent population size. These findings offer valuable insights into the population structure of Peruvian Creole goats, providing guidance for conservation and sustainable breeding efforts.
Integrated multivariate analysis of morphological and yield traits in native Capsicum chinense ecotypes grown in acidic soils of the Peruvian Amazon
(Frontiers Media S.A., 2026-04-15) Díaz Chuquizuta, Henry; Manrique Gonzales, Luis Fernando; Sánchez Ojanasta, Martín; Cuevas Gimenez, Juan Pablo; Martínez Zapata, Boris Guillermo; Flores Sinti, Geiner; Kerry Tanchiva, Juan Jose; Vallejos Torres, Geomar
Introduction: The comprehensive characterization of native Capsicum chinense ecotypes represents a strategic priority for genetic improvement, germplasm conservation, and the sustainable use of Amazonian crops. The objective of this study was to evaluate morphological, phenological, and productive variability among 12 ecotypes from the Peruvian Amazon by integrating multivariate análisis and machine learning with soil physicochemical characterization. Methods: The research was conducted on acidic tropical soils with low organic matter content and limited availability of exchangeable bases, conditions representative of degraded Amazonian agroecosystems, which enabled the assessment of soil–plant interactions and their influence on phenotypic expression and crop yield. Results: The results revealed a broad, well-structured range of phenotypic variability, with fruit diameter, fruit length, fruit weight, and seed weight identified as the primary morphological determinants of yield and adaptive capacity under low-fertility soil conditions. Principal component analysis indicated that four components explained more than 70% of the total variance, primarily associated with productivity, fruit morphometry, and phenological traits. Cluster análisis identified groups with high internal consistency, while linear discriminant analysis validated the phenotypic structure, achieving a classification accuracy of 91.8%. The ecotypes JEB-028 and LAG-022 exhibited superior productive performance, whereas BAL-012 and YUR-001 demonstrated greater phenotypic stability under restrictive soil conditions. Discussion: Overall, these findings confirm the strategic value of native Amazonian germplasm and underscore the importance of integrating edaphic diagnostics into genetic selection programs and into strategies for the sustainable management and restoration of degraded agricultural soils in the Amazon.
Climate, carbon, and soil stability: a key link in coffee-growing landscapes of the Peruvian Amazon
(Frontiers Media S.A., 2026-04-14) Romero Chávez, Lorena Estefani; Hermoza Ayme, Nilton Alexander; Chuchon Remon, Rodolfo Juan; Aldava Pardave, Uriel; Arroyo Isuiza, Rosa Karen; Solórzano Acosta, Richard Andi; Vallejos Torres, Geomar
Introduction: Coffee cultivation in the Central Peruvian Amazon, one of the country's most important production regions, faces increasing challenges from soil degradation and climate change impacts. This study aimed to evaluate the influence of the altitudinal gradient on soil organic carbon (SOC) stocks and soil erodibility (K index) in coffee-growing systems. Methods: Three altitudinal zones were established for sampling (0–20 cm depth): zone 1 (900–1200 m.a.s.l.), zone 2 (1201–1400 m.a.s.l.), and zone 3 (1401–1600 m.a.s.l.). Within these zones, physical and chemical soil properties were analyzed, and SOC and soil erodibility (K index) values were calculated. Results: The results revealed a direct and statistically significant relationship between altitude and carbon sequestration capacity. Zone 3 exhibited the highest SOC (63.19 t·ha⁻¹) and organic matter (OM) content (5.49%), compared with zone 1 (37.56 t·ha⁻¹). This difference is attributable to the climatic conditions at higher elevations, characterized by greater precipitation and lower temperatures. Structural equation modeling (SEM) indicated that increasing altitude enhances SOC (b = 0.42), which in turn improves the soil structural stability index (SI) (R² = 0.87) and reduces the K index (b = –0.38). Overall, the findings demonstrate that organic carbon acts as a key mediator between topography, soil texture, and susceptibility to erosion. The altitudinal gradient thus represents a major controlling factor influencing the health and structural stability of coffee soils. Discussion: These results highlight the need to implement site-specific soil management practices, emphasizing intensive conservation strategies in low-altitude coffee-growing systems to mitigate accelerated erosion and ensure long-term production sustainability under changing climatic conditions.
Water management in quinoa cultivation: quantification of the water footprint and climate projections in an inter-Andean valley
(Springer, 2026-04-07) Flores Galindo, Fredy; Condori Ataupillco, Leivi Tatiana; Flores Marquez, Ricardo; Alarcón Romani, Susan Milagros; Solórzano Acosta, Richard Andi
Efficient water management in agriculture is key to the sustainability of crops in inter-Andean valleys (IAV), where water availability is at risk due to climate change (CC). Quinoa, as a strategic crop in these ecosystems, requires a detailed analysis of its water use to optimize its production without compromising water resources. This study quantified the water footprint (WF) (green, blue and grey) of three quinoa varieties (INIA 415 Pasankalla, INIA 420-Negra Collana and INIA 441-Señor del Huerto) harvested in a sandy loam soil in an IAV of Peru. In addition, the trend of the WF in 12 agricultural seasons was evaluated, and future climate scenarios (SSP1-2.6, SSP3-7.0 and SSP5-8.5) were projected to estimate the impact of CC on the crop's water demand towards 2090–2100. The results showed significant differences in water-use efficiency among varieties. INIA 441-Señor del Huerto showed the highest water efficiency, with a 3.20 t ha⁻¹ yield and a low total WF, making it more sustainable under CC conditions. In contrast, INIA 420-Negra Collana had a higher water demand, making it less viable under water-stress scenarios. Climate projections indicate an increase in water demand for quinoa under scenarios of greater radiative forcing, which underscores the need to develop water management strategies. These findings highlight the importance of selecting more efficient varieties for water use and adopting sustainable practices to mitigate the effects of climate change on quinoa production at IAV.
Microbial bio-inoculation effects on the seed germination dynamics and field performance of pea (Pisum sativum L.) under osmotic stress and fertilization in the Amazonas region of Peru
(MDPI, 2026-04-10) Guevara Fernández, Francisco; Casas Niño, Sebastian Antonio; Munoz Salas, Milagros Ninoska; Meza Maicelo, Wagner; Oliva Cruz, Manuel; Lozano Isla, Flavio
Microbial bio-inoculants have been proposed as management tools to enhance crop performance under variable environmental conditions; however, their effectiveness is often influenced by site-specific factors. This study evaluated the effects of bio-inoculation on seed germination and seedling vigor of pea under osmotic stress induced by polyethylene glycol (PEG 6000), and its interaction with two fertilization levels (75% and 100% of the recommended dose) under field conditions in the Amazonas region of Peru. Under laboratory conditions, germination percentage remained high across all treatments (93.3–100%) and was not affected by bio-inoculation or osmotic potential; however, osmotic stress altered germination dynamics, increasing mean germination time from 1.85–2.09 days at 0 MPa to 2.26–2.43 days at −0.8 MPa, while germination synchrony and seedling vigor decreased as stress increased. The seedling vigor index reached maximum values at −0.2 MPa (4.47–5.29) and declined at −0.8 MPa (1.50–2.00), and multivariate analyses showed that variation in germination responses was mainly associated with germination timing and vigor rather than seed viability. Under field conditions, no significant effects of fertilization level, microbial bio-inoculation, or their interaction were detected on agronomic traits or yield, although variability between locations was observed; plant height ranged from 38.5–46.3 cm in Lamud and from 100.6–108.3 cm in Molinopampa, while grain yield varied from 698–1846 kg/ha and 8771–9919 kg/ha, respectively. Overall, environmental conditions exerted a stronger influence than microbial bio-inoculation on germination dynamics and field productivity, while the findings provide practical guidance for improving pea production with bio-inoculants and optimized fertilization.
Interacción biológica de la entomofauna en Vigna unguiculata L. asociada a la temperatura y fases fenológicas en un sistema de cultivo orgánico
(Universidad Nacional de Tumbes, 2026-03-31) Villegas Navarro, Eduardo Josue; Castillo Carrillo, Pedro S.; Mogollón Farias, César Augusto; Garcia Garcia, Segundo Melecio; Vásquez Garcia, Cesar Alejandro; Luna Socola, Andy Josué; Purizaga Preciado, Jorge Luis; Ruiz Polo, Archi Alejandro; Cordova Campos, Jose Stalyn
Vigna unguiculata L. es un cultivo clave para la seguridad alimentaria, sin embargo, su rendimiento se ve afectado por plagas y agroquímicos que perjudican a insectos benéficos. Por ello, estudiar las asociaciones con factores bióticos y abióticos es importante, más aún en sistemas orgánicos. El presente estudio evaluó las interacciones biológicas en la entomofauna de V. unguiculata L. asociada a la temperatura y fases fenológicas en un sistema orgánico establecido en la EEA-Los Cedros del INIA-MIDAGRI (Perú), empleando semillas del cultivar vaina blanca. Se realizaron nueve evaluaciones fragmentadas en las fases vegetativa, de floración y reproductiva durante la fenología del cultivo por 45 días. El muestreo se efectuó en 20 plantas seleccionadas al azar, mediante red entomológica y aspirador manual. La identificación taxonómica se llevó a cabo con claves entomológicas, y los datos fueron analizados mediante pruebas de normalidad (Shapiro-Wilk), correlaciones de Spearman y frecuencias taxonómicas. Se registraron seis órdenes con especies como Toxomerus sp., Ocyptamus dimidiatus, Allograpta sp., Apis mellifera, Spodoptera eridania (polinizador), Zelus sp., Hippodamia convergens, Cycloneda sanguinea, Chrysoperla externa (depredador), especie de la familia Lygaeidae, Sibovia sp., Empoasca kraemeri (plaga), Rupela albina (migratorio y/o visitante), Digonogastra sp. (Parasitoide). Se observó que la entomofauna varió por etapa fenológica del cultivo, siendo Hymenoptera el orden más abundante, seguido de Hemiptera, Diptera y Coleoptera, mientras que Lepidoptera y Neuroptera fueron menos frecuentes. La temperatura promedio fue de 28,2 °C, sin correlaciones significativas con la abundancia de insectos. Se infiere que V. unguiculata L. manejado con un sistema orgánico favorece diversas interacciones biológicas, donde su fenología es un factor determinante en la dinámica de las especies de insectos, mostrando una influencia más significativa que la propia temperatura.
PCR-RFLP in silico del gen 18S rRNA como alternativa para la identificación de nematodos entomopatógenos
(Universidad Nacional de Tumbes, 2026-03-31) Ruiz Polo, Archi Alejandro; Rojas Gonzales, Joel Michel; Castillo Carrillo, Pedro S.; Mogollón Farias, César Augusto; Valladolid Ramos, Milton; Garcia Garcia, Segundo Melecio; Cornejo Hidalgo, Rosa Esmelda; Vasquez Garcia, Cesar Alejandro; Cordova Campos, Jose Stalyn
En países en vías de desarrollo, el acceso a tecnologías modernas para el control de plagas es restringido, lo que plantea la necesidad de innovar en métodos y/o técnicas alternativas que sean más accesibles. El objetivo del estudio fue determinar la PCR-RFLP in silico del gen 18S ARNr como técnica alternativa en la identificación de nemátodos entomopatógenos. Se evaluaron dos cepas purificadas de larvas adultas de nematodos entomopatógenos, a partir de las cuales se extrajo el ADN genómico. Posteriormente, se llevó a cabo la amplificación del gen 18S del ARNr mediante PCR convencional y una secuenciación de ADN por la tecnología de Sanger en doble cadena. Las secuencias obtenidas fueron alineadas con el software MEGA v.11 y se generaron secuencias consenso de aproximadamente 850 pares de bases. Luego, se utilizaron herramientas como BLAST para la asignación taxonómica de especies y Restriction Mapper v.3 para el análisis de sitios de restricción y simulación de digestión enzimática. Las cepas analizadas se identificaron como Heterorhabditis indica y Heterorhabditis bacteriophora. En Heterorhabditis indica se hallaron 26 sitios de restricción, seleccionando cuatro sitios según su posición media (MslI, NruI, Tsp45I y BseRI), que luego de digerirlos in silico, generaron fragmentos de ADN con longitudes distintas. Por otra parte, en Heterorhabditis bacteriophora, se halló el mismo número de sitios de restricción, se seleccionaron tres (BglII, FokI y BstXI) y al digerirlos se obtuvieron fragmentos de ADN con diferentes longitudes. Los fragmentos de ADN (RFLP) obtenidos permitieron diferenciar claramente ambas especies. Los resultados demuestran que la técnica PCR-RFLP In silico del gen 18S ARNr es una herramienta efectiva para la identificación taxonómica de nematodos entomopatógenos, ofreciendo una alternativa viable en contextos donde los recursos son limitados y el control biológico es una alternativa.
Local ecological knowledge for water management: a feasible solution through ecosystem services in high-Andean mountains
(Frontiers Media S.A., 2026-02-27) Flores Marquez, Ricardo; Puga Calderón, Rodrigo Julio; Condori Ataupillco, Leivi Tatiana; Madrigal Martínez, Santiago
Introduction: Mountain ecosystems are particularly sensitive to the impacts of climate change, which, in turn, affect the wellbeing of local populations. In this context, the sustainable use of ecosystem services is crucial to supporting the social and economic welfare of Andean communities in South America. The development of local ecological knowledge has facilitated both environmental adaptation and strengthened environmental awareness. Particularly, the qocha, an ancestral water-related agricultural technology, provides hydro-social value, and represents a local climate-change adaptation measure, however their ecosystem services valuation has not been integrally performed. Thus, we aimed to map and assess the perceived services associated with Yuyuchaqocha, a small reservoir managed by a high-Andean community characterized by pronounced economic poverty. Methods: The methodology included semi-structured interviews with key informants, participatory mapping, and field observation. The participatory process involved the community, municipal, and technical stakeholders operating within the study area. The economic valuation was done by contingent valuation, market prices, and travel cost methods. Results: The results revealed that local inhabitants recognized 10 ecosystem services (five provisioning services and five cultural services), primarily concentrated along its shores. The total local perceived value of these services was estimated at USD 10,104.97, benefiting the rural communities of Huanupampa and Totos. Among the cultural services, those related to community organization, species conservation, and the pagapu celebration had the highest economic values. Discussions: Disseminating the results at various organizational levels would foster the integration of the local worldview into management plans, contributing to their legitimacy and sustainability, and promoting the involvement of institutions engaged in the intervention of mountain water socio-ecosystems. In this regard, integrating local ecological knowledge with ecosystem services valuation can be replicated or adapted in other regions.
Agromorphological diversity and structuring of lima bean (Phaseolus lunatus L.) accessions from the National Germplasm Collection of INIA Peru
(Universidad Autónoma de Yucatán (UADY), 2026-04-07) Ventura Neyra, Cristhian Jesus; Dadther Huaman, Hans Adams; Gambini de la Cruz, Tabita Abigail; Zamata Guzman, Raul Ruben; Aymara Meneses, Lucy; Garay Duran, Diana Yessica; Irigoin Becerra, Esperanza; Saenz Rodriguez, Hanz; Parco Quinchori, Jhimy Andy; Espinoza Ponte, Yeraldy Nathaly; Aybar Peve, Leandro Joel
Background. Lima bean (Phaseolus lunatus L.) is a key crop for food security along the Peruvian coast due to its high nutritional value and tolerance to drought and heat. However, the agromorphological variability of its national germplasm had not been characterized comprehensively or across multiple years. Objective. To characterize the agromorphological diversity over multiple years and identify phenotypic groups among 35 accessions of the National Lima Bean Germplasm Collection (INIA–Peru). Methodology. Thirty-six descriptors (17 qualitative and 19 quantitative) were used to characterize agromorphology across three consecutive growing seasons (2021, 2022, and 2023). A factorial analysis of mixed data (FAMD) was applied, followed by hierarchical clustering, estimation of Shannon and Pielou diversity indices, mean comparisons, and Pearson correlations. Results. Four phenotypic groups were identified, mainly defined by traits related to earliness and productivity. The Shannon (H′ = 1.05) and Pielou (J′ = 0.95) indices revealed high diversity in pod and seed traits. Quantitative variables, except leaflet length, differed significantly among groups (p < 0.01), and strong correlations were found among earliness traits (r > 0.87) and among yield components (r = 0.74–0.84). Implications. This research provides key information to support conservation strategies and the use of lima bean germplasm in genetic improvement programs in Peru and other similar agroecological regions. Conclusions. The National Lima Bean Germplasm Collection of INIA exhibits a broad and structured phenotypic diversity organized into four groups, supported by nine qualitative and eighteen quantitative discriminant descriptors.
Valorization of sugarcane residues as a bio-input for sustainable cultivation of cucurbita moschata on the northern coast of Peru
(Arid Zone Research Association of India, 2026-03-28) Palomino Arias, Mickel; Salazar Coronel, Willian; Paredes Jacinto, Juan Carlos; Rivas, Johan; Calero Rios, Emilee Nahomi; Aldava Pardave, Uriel; Solórzano Acosta, Richard Andi
The valorization of agro-industrial waste represents a pivotal strategy for enhancing the sustainability of horticultural systems in arid regions. This study evaluated the potential of compost derived from sugarcane residues as an ecological alternative to chemical fertilization in the cultivation of Cucurbita moschata (loche), a culturally and economically significant crop on the northern coast of Peru. Four fertilization treatments were compared: conventional mineral fertilization, compost from sugarcane residues enriched with efficient microorganisms, compost supplemented with digestive enzymes, and guano from islands. Physiological parameters (plant vitality, elongation, number of shoots, and SPAD index) and productive indicators (fruit number, length, diameter, and °Brix) were evaluated under dry climatic conditions. Significant differences were observed in SPAD values at 107 days after sowing, with conventional mineral fertilization exhibiting the highest index (51.39 ± 5.4). While yield related traits did not differ statistically among treatments, compost from sugarcane residues enriched with efficient microorganisms showed vegetative development comparable to that of the mineral treatment, along with a positive trend in plant length. No significant differences were observed in fruit quality or number. These results suggest that composted sugarcane residues, especially when enriched with microbial agents, can support crop growth without compromising productivity. This study constitutes the first formal report on the application of sugarcane waste compost in C. moschata cultivation. Its implementation could promote agroecological practices, reduce reliance on mineral
Aislamiento e identificación molecular de hongos en bananos con y sin manchas foliares
(Universidad de Costa Rica, 2026-04-08) Mogollón Farias, César Augusto; Cordova Campos, Jose Stalyn; Garcia Garcia, Segundo Melecio; Ruiz Polo, Archi Alejandro; Mialhe, Eric
Introducción. La estructura foliar del banano es un factor determinante en el rendimiento y desarrollo del cultivo. La composición microbiana en manchas foliares es relevante para entender la aparición y propagación de enfermedades. Objetivo. Realizar el aislamiento e identificación molecular de hongos en bananos con y sin manchas foliares. Materiales y métodos. En el año 2019 se realizó una investigación con diseño no experimental, enfoque cuantitativo y nivel descriptivo, utilizando hojas de banano de Musa acuminata (cv. IC2) con manchas (HCM) y sin manchas (HSM), recolectadas en una parcela agrícola con manejo convencional situada en el norte del Perú. En medios de cultivo microbiológicos se cultivaron fragmentos de hojas de 5 x 5 mm, se aislaron cepas fúngicas caracterizándose por sus macroestructuras, se extrajo ADN de las cepas y se realizó una PCR convencional dirigida a la región ITS de hongos de 700 pb. Luego, los productos PCR se secuenciaron por el método de Sanger en doble cadena. Posteriormente, se realizaron las asignaciones taxonómicas a nivel de especie utilizando la herramienta BLAST, basada en la comparación por homología con secuencias del GenBank. Resultados. Se identificaron un total de once especies fúngicas en HCM y ocho en HSM, abarcando tanto especies fitopatógenas como no fitopatógenas. Las especies predominantes en el HCM fueron Fusarium spp., Cladosporium cladosporioides y Lasiodiplodia theobromae. Además, se observó que HCM compartía tres géneros con HSM: Nigrospora, Cladosporium y Fusarium. Conclusión. Se realizó el aislamiento e identificación molecular de hongos en bananos con y sin manchas foliares, hallándose especies fitopatógenas y benéficas.
Identification of Metamasius hemipterus (Coleoptera: Dryophthoridae) and its biological control through the use of species of the genus Beauveria and Metarhizium. Amazonas, Peru
(Frontiers Media S.A, 2026-01-12) Leiva Espinoza, Santos Triunfo; Román Peña, Alcides; Aguilar, Vilma; Requejo, Elizabeth; Meza Maicelo, Wagner; Banda Martinez, Duber; Huaman Pilco, Ángel Fernando; Loyola , Fredy; Loja, Melissa; Oliva Cruz, Manuel; Maicelo Quintana, Jorge
Biological control of insect pests represents a key strategy toward sustainable agriculture. This study, focused on the morphological and molecular identification of the sugarcane weevil, Metamasius hemipterus, (Coleoptera: Dryophthoridae), and on the evaluation of the biocontrol potential of four entomopathogenic fungi: Beauveria bassiana, Metarhizium anisopliae, Beauveria peruviensis, and Metarhizium sp. Molecular identification was conducted through phylogenetic analysis, while morphological identification was based on the description of characteristics following established protocols. Both approaches confirmed the identity of the pest as Metamasius hemipterus L. Bioassays were carried out under a completely randomized design, testing four conidial concentrations, plus a control. Metarhizium anisopliae at 1 × 10¹⁰ conidia/mL was the most virulent, producing the highest mortality and exhibiting the lowest lethal concentration (LC₅₀ = 2.68 × 10⁹ conidia/mL) against Metamasius hemipterus adults. Conversely, Beauveria peruviensis at 1 × 10¹⁴ conidia/mL achieved the highest colonization efficiency in insect cadavers, with a mycosis rate of 99.4%. These findings indicate that Beauveria peruviensis and Metarhizium anisopliae are promising biological control agents against the sugarcane weevil, the major pest of sugarcane in the Amazonas region of Peru.
Agroecosystems with greater canopy cover increase soil organic carbon density and reduce soil erodibility in the Peruvian Amazon
(Frontiers Media S.A., 2026-03-11) Chuchon Remon, Rodolfo Juan; Solórzano Acosta, Richard Andi; Cruz Luis, Juancarlos Alejandro; Vallejos Torres, Geomar
Introduction: Soil degradation in tropical agricultural landscapes represents one of the major challenges for sustainability and food security, particularly in the Peruvian Amazon. In this region, the loss of vegetative cover alters carbon storage and increases vulnerability to erosion. This study evaluated how gradients of canopy structure in representative agroecosystems—cassava with no canopy (CV-S), oil palm with intermediate canopy density (OP-S), cacao with medium-density canopy (CC-S), and coffee with high-density canopy (CF-S)—influence soil organic carbon density (SOCD) and erodibility (K factor). Methods: A total of 1,049 soil samples (0–20 cm) were collected across three Amazonian regions and analyzed for their physical, chemical, and textural properties, complemented by multivariate and geostatistical analyses using ordinary kriging. Results: Results showed that SOCD increased consistently with canopy density, from 32.68 t C ha⁻¹ in CV-S to 82.64 t C ha⁻¹ in CF-S. The Factor K exhibited the opposite pattern, decreasing from 0.31 to 0.16 as tree cover increased, indicating greater resistance to erosion. Erodibility was primarily determined by soil texture, with a strong positive correlation associated to silt content (r = 0.89) and a negative with sand content (r = –0.74). Likewise, SOCD showed a very high correlation with total nitrogen (r = 0.96), reflecting a tight coupling between carbon accumulation and nutrient availability under denser canopies. Principal component analysis further revealed that dense-canopy systems are related to higher SOCD and total nitrogen, whereas canopy-free systems are linked to higher bulk density and greater susceptibility to erosion. Discussion: Spatial modeling showed that agroecosystems with more developed canopies exhibit better spatial structure and predictive performance, indicating a more stable edaphic organization under dense tree cover. Taken together, the results demonstrate that canopy structure functions as a key ecological regulator in Amazonian agroecosystems, with higher canopy cover promoting greater soil carbon accumulation while reducing soil erodibility. This highlights that dense-canopy systems, such as coffee and cacao, represent effective strategies to strengthen the sustainability and resilience of agricultural landscapes in the Peruvian Amazon.
Boosting biomass and leaf area with biol: morphological and yield responses of Pennisetum in the Peruvian highlands
(MDPI, 2026-03-31) Huaman Lizana, Darwin; Tarifa, Waldyr; Rodriguez, Misael; Tecsi Taipe, Sayda; López Mendoza, Yolvi; Ruiz Llontop, Deysi; Saucedo Uriarte, José Américo; Vásquez, Héctor V.; Mejía, Flor L.; Paucar, Ysai
The intensive use of chemical fertilizers in agriculture contributes to environmental pollution, which has driven the search for sustainable alternatives such as organic fertilizers. Among these, biofertilizer has garnered interest due to its potential to improve crop growth and yield. The objective of this study was to evaluate the effect of two types of biofertilizer: Bio Chumbinia (standardized) and traditional biofertilizer, as well as a control treatment (water), on the morphology, growth, yield, and leaf area of Maralfalfa (Pennisetum sp.). Morphological and growth variables were measured every 14 days, while yield and leaf area were evaluated in two successive periods corresponding to 42 days of growth. The results indicated that most morphological and growth parameters were significantly influenced by treatment, time, and evaluation (p < 0.05), except for tiller number, blade number, and the blade emergence rate (p > 0.05). Bio Chumbinia showed superior values compared with the control at 6.0 cm for plant height, 0.1 cm/day in the growth rate, 4.1 cm for blade length, and 1.2 mm for blade width; when compared with the traditional biol, the values were similar. The growth rate and leaf emergence peaked on day 14 and subsequently declined. The fresh and dry matter yields were consistently higher on Bio Chumbinia treatment than others (p < 0.05). Although no differences were found for blade weight and leaf area between Bio Chumbinia and the control, the leaf area in Bio Chumbinia was 1400 cm2 more than the control. The second evaluation showed improved productivity, which is consistent with the higher values on the morphological characteristics. No differences were observed in the leaf-to-stem + sheath dry matter ratio. These results demonstrate the potential of Bio Chumbinia to improve the productive performance of Maralfalfa as a foliar fertilizer in sustainable agricultural systems in Peru.
Improving clonal propagation of Eucalyptus grandis x urophylla with indole-3-butyric acid
(Universidad Austral de Chile / Facultad de Ciencias Forestales y Recursos Naturales, 2026-03-26) Casas Niño, Sebastián; Mondragón Aguirre, Gino; Lozano Isla, Flavio; Cuellar Bautista, José Eloy
The Eucalyptus grandis × E. urophylla hybrid is characterized by its rapid growth and high productivity, which has led to an increasing demand for its propagation in nurseries. To preserve these desirable traits, it is essential to establish clonal gardens and apply effective clonal propagation methods. With the aim of advancing knowledge on asexual propagation techniques, this study evaluates the influence of indole-3-butyric acid (IBA) and a commercial formulation combining IBA and naphthaleneacetic acid (NAA) on the rooting and root development of cuttings of this hybrid. To achieve this, cuttings were collected from a clonal garden and subjected to five rooting treatments: T0 (control) with 0 ppm IBA; T1 with 1,000 ppm IBA; T2 with 1,500 ppm IBA; T3 with 2,000 ppm IBA; and T4, a commercial formulation containing 4,000 ppm NAA and 1,000 ppm IBA. The experiment was conducted under a completely randomized design (CRD) with 90 experimental units. After treatment application, the cuttings were placed in a greenhouse for 30 days. At the end of this period, rooting percentage, mortality rate, number of roots, root length, and root dry weight were assessed. The results indicated that T2 and T4 exhibited the best performance in terms of rooting and root development. Furthermore, comparison with other studies revealed that excessively high concentrations of IBA can exert toxic effects on cuttings. Overall, the study concludes that IBA, either alone or in combination with NAA, positively influences the rhizogenesis process of Eucalyptus grandis × E. urophylla cuttings, increasing rooting percentage by up to 62% compared to the control.

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