Impregnación de aceite de Neem (Azadirachta indica) en soporte textil para combatir la mosca de la fruta Anastrepha striata.

Abstract

The objective of this research was the impregnation of textile supports with Neem oil at two concentrations 3 and 5 % to evaluate its repellent effect against the fruit fly Anastrepha striata at 8 and 15 days analizing the oviposition of the fly. Concentrations of the active ingredient (azadirachtin) in the oil and textile supports were determined by chromatography (HPLC). The initial concentration of the oil was 6 165 ppm and on textile supports impregnated with 5 and 3 % of oil were found 173 and 154 ppm, respectively. To evaluate the repellent effect, 3 cages for fruit flies were used where 10 guavas fruit were colocated; 15 flies and a textile support impregnated with 3, 5 or 0 % Neem oil (control) were placed. When counting the larvae, the best results were determined in the textile support impregnated with 5 % oil, with 2 larvae, compared to the control, where 10 larvae were obtained at 15 days. Degradation of azadirachtin in the textile supports was determined by HPLC. At 8 and 15 days, the textile support impregnated with 5 % Neem oil, degraded 58.30 % and 75.54 %, respectively.