Universidad Nacional Agraria La Molina. Escuela de Posgrado. Doctorado en Agricultura Sustentable

An environmental impact assessment was carried out in the Chancay-Huaral valley for tomato, bell pepper, cucumber, carrot, and lettuce crops. Additional surveys and interviews were conducted to 96 farmers and 10 of the main pesticide supplies in the area. We determined that for the tomato crops between 33 to 42 pesticides applications were made with 27 active ingredients; for the bell pepper crops 36 to 45 applications with 28 active ingredients; for the cucumber crops 22 applications with 19 active ingredients; for the carrot crops 8 applications with 11 active ingredients; and for the lettuce crops 12 applications with 15 active ingredients. For these applications, the farmers prepared the mixtures using commercial formulations or according to their own criteria, guided by the suppliers. Due to the number of applications carried out, the pesticide withdrawal periods were not respected,...

The present study was conducted in the fields of the Chavimochic irrigation, located in La Libertad Region-Peru. Prodiplosis longifila Gagné (Diptera Cecidomyiidae) is considered the key pest of asparagus and other vegetables cultivation. This study aimed to characterize the presence of this insect pest in asparagus crop under drip irrigation conditions, in order to find the best alternatives for its control. The cultivar most planted in the Chavimochic Irrigation is cultivar UC 157 and that the meteorological conditions of the area are optimal for the production of asparagus; but also for the establishment and reproduction of the insect. The morphology of asparagus is favorable for reproduction of the insect, from larva to adult, since it frequently bracts and flowers at larval stage and establishs itself at the adult stage; at the base of the plant. All experiments conducted, had at l...