Manejo de gusano trozador (Agrotis ipsilon) en lechuga (Lactuca sativa L.), a partir de extractos de dos variedades de ají (Capsicum annuum)

Abstract

The investigation was made on Mr. Cristóbal Chango property, located in Picaihua parish, Ambato canton, Tungurahua province, whose coordinates are: 1º 16 "02" South latitude and 78º 34 "60" West length, of 2 657 altitude, with the purpose: evaluating chili pepper two 1extracts (Capsicum annuuum) (“rocoto and jalapeño”), in two 2concentrations (20% and 40%), to control chewing worm (Agrotis ípsilon), in lettuce (Lactuca sativa L.) cultivation. The treatments were four and witness. The completely randomized block design was used, in 2 x 2 + 1 factorial arrangement, with five replications. The variance analysis was performed, Tukey tests at 5% for treatments and interaction and 5% DMS tests for extracts and concentrations. The economic analysis was carried using BCR methodology. With jalapeño pepper extract application (E2), the best results were obtained, reporting a lower incidence rate at 15 days (11,25%), at 30 days (21,25%) and at 45 days (35,00%, as a lower percentage of severity at 15 days (13,82%), at 30 days (15,83%) and at 45 days (17,79%); greater diameter of the cabbage (16,09 cm) and the highest yields (33,33 kg/ha). With extracts application in 40% concentration (C2), good results were obtained with a lower percentage of incidence at 15 days (11,25%), at 30 days (21,25%) and at 45 days (34,38%); lower percentage of severity at 15 days (13,90%), at 30 days (15,92%) and at 45 days (17,92%). Major equatorial diameter (16,26 cm), reaching the highest yields (32,00 kg/ha). From an economic analysis it is concluded that, the treatment that was applied jalapeño pepper extract in concentration of 40% (E2C2), reached the highest benefit-cost ratio of 0,47, where the net benefits obtained were 0,47 times what was invested.