Examinando por Autor "Velásquez Ochoa, Edwin Ricardo"

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Biological cycle and comparative study of bioinsecticide efficiency on the Heliothis virescens (Lepidoptera:Noctuidae) borer in blueberry cultivation
(Universidad Nacional José Faustino Sánchez Carrión, 2023-07-20) Velásquez Ochoa, Edwin Ricardo; Quiliche Duran, Jean Piere Jesús
Objectives: To determine the biological cycle of H. virescens and the comparative efficiency of bioinsecticides of Bacillus thuringiensis (Bt) (native strain) with respect to Bt (Kurstaki strain) and nuclear polyhedrosis virus (NPV), on fifth instar larvae. Methodology: Postures and larvae of H. virescens were collected from agricultural farms in Huaral (Lima) and reared in the laboratory. The Bt and NPV strains were applied to fifth instar larvae under field conditions, evaluating larval mortality at 72 hours using Tukey's test with the Infostat software. Results: It was found that the life cycle of H. virescens was 77.78 ± 9.14 days with complete metamorphosis. Larval mortality was statistically similar (p> 0.05) with native Bt and Bt Kurstaki treatments, and NPV application outperformed (p< 0.05) both Bt treatments in fifth instar larval mortality. Conclusion: The life cycle of Heliothis virescens in blueberries has a complete metamorphosis with six larval stages ranging from 59-88 days and better control of fifth-instar larvae was obtained with NPV.
Cultivo de ají páprika
(Instituto Nacional de Innovación Agraria - INIA, 2010-01) Velásquez Ochoa, Edwin Ricardo; Nicho Salas, Pedro Eduardo
Esta publicación proporciona los conocimientos agronómicos fundamentales para el manejo tecnificado del cultivo de ají páprika: requerimientos agroclimáticos, preparación del suelo, sistemas de siembra, plagas y enfermedades, cosecha y poscosecha .
Desarrollo de alternativas de Manejo Integrado de Plagas para la producción sostenible del cultivo de arándanos en Huaral – Región Lima.
(Instituto Nacional de Innovación Agraria, 2020) Velásquez Ochoa, Edwin Ricardo; Meza Quispe, Benjamin
En Perú, el arándano especialmente en la costa norte presente problemas fitosanitarios que vienen afectando el cultivo, las principales plagas insectiles son Bemisia tabaci, Chloridea virescens, Helicoverpas pp. Paranomala undulata peruviana, Lygirus maimon, Ceratitis capitata, Trips tabaco y Frankliniella sp., Aleurodicus juleikae, Aleurodicus coccolobae, Pseudococcus longispinus, Dysmicoccus brvipes, Olygonichus spp, Prodiplosis longifila. Mientras que las enfermedades más frecuentes son Phytophthora cinnamomi, Botrytis cinérea Agrobacterium tumefaciens. Alternaria sp. Lasiodiplodia sp., las aves y malezas. Sin embargo, en los agroecosistemas de producción del cultivo de arándano en la región Lima existe poca información reportada de plagas registradas y el desarrollo de alternativas de control. Es por ello, que el objetivo de este proyecto fue desarrollar y/ adaptar alternativas tecnológicas en manejo integrado de plagas en el cultivo de arándano.
Desarrollo de nueva tecnología en el control biológico de plagas en los sistemas agroecológicos andinos mediante el uso benéfico de carábidos (Coleóptera) como depredadores
(Instituto Nacional de Innovación Agraria, 2020-03) Delgado Mamani, Pedro; Velásquez Ochoa, Edwin Ricardo; Mamani, Frank; Aro, Verónica
El objetivo del proyecto fue estudiar componentes tecnológicos que fortalezcan el control biológico de plagas en los sistemas agroecológicos andinos mediante el uso de carábidos depredadores de plagas. Para cumplir con dicho objetivo, se planificaron y desarrollaron 4 experimentos de 4 eventos con el apoyo de la alianza estratégica de Bio Orgánicos a través de sus socios agricultores.
Effects of salinity on three mandarin cultivars grafted on two different rootstocks
(Universidad Nacional Agraria La Molina, 2022-08-30) Velásquez Ochoa, Edwin Ricardo; Burga, C.; Vargas, L.
Citrus, one of the most important fruit crops in the world and also they are sensitive to salt stress. The negative effects of stresses often lead to reductions in fruit yield and quality. To assess the effects of salinity on some growth traits, a greenhouse test was performed with the cultivars ‘Mihowase’, ‘Primosole’ and ‘W. Murcott’ as grafted on ‘Cleopatra’ and ‘Swingle citrumelo’ as rootstocks. The experiment was conducted at the Agrarian Experimental Station of National Institution for Agricultural Innovation in Donoso-Huaral, ubicated 90 km north of Lima. The plants were irrigated with water plus NaCl with an Electrical Conductivity of 0.5 or 4.5 dS/m as salt stress. The variables under evaluation were leave losses, fresh and dry weight of stem, leaves and roots as well as relative water content in the plants. The results showed that the rootstocks ‘Cleopatra’ was more tolerant than ‘Swingle citrumelo’. The cultivars used as scions affected both rootstocks in all the evaluated traits being more notorious in the amount of feeding roots. Selection of mandarin trees for production shout take in consideration the combination scion/rootstock.
Integrated pest management in Peru
(CABI Publishing, 2003) Palacios Lazo, María; Lizárraga Travaglini, Alfonso; Velásquez Ochoa, Edwin Ricardo; Carranza Hernández, Enrique; Segovia, Isaías
The successful Peruvian cotton IPM program, begun in the 1950s, has now been extended to various other countries. Currently, IPM in export crops such as cotton, citrus, sugarcane, mango and asparagus has improved marginal profits for Peruvian producers. In crops for domestic consumption such as potato, IPM has improved the food supply for the Andean population. In addition, it has reduced the risk of pesticide exposure, pesticide residues in food and in the environment. Potato IPM has also socially impacted the resource-poor farmers on Peruvian mountains.