Avaliar a percepção dos pequenos produtores de hortaliças à utilização de extratos vegetais no controle de Plutella xylostella (Linnaeus, 1758) (Lepidoptera: Plutellidae) na região de Dourados-MS

Abstract

The misuse of pesticides for decades has led to the accumulation of toxic waste in food, contamination of water and soil, intoxication of farmers, selection of resistant pests, among many other problems. Plutella xylostella known as the cruciferous moth is responsible for major damage to the brassica crop. They are resistant to a large number of chemical insecticides, the development of alternative methods that would be the botanical insecticide that is necessary to minimize the applications of products that impact and reduce the damage of this pest. Thus, the objective of this work was to evaluate the producers' satisfaction by applying the aqueous extract of Campomanesia adamantium in brassica cultivars affected by P. xylostella. The aqueous extract was prepared from 50 g of vegetable matter to 500 mL of 10% distilled water and then applied to the vegetable garden. The application of the extract was performed at 7 am, 1 application per week for 1 month on each garden in July, August and September. The evaluations were performed during the end of the applications. As the results were analyzed based on the questionnaire directly answered by the producer. Initially at this dose applied in the field the result was reasonable for some producers others did not see an improvement, but would use the extract because of: fast acting, low to moderate toxicity, selectivity, cost and availability.