Extratos da algarobeira como alternativa de controle do pulgão preto do feijoeiro Aphis craccivora

Abstract

The extracts of plants are recommended in family agriculture, characterized by small and medium producers, mainly related to the organic production. One way of obtaining compounds or plant substances is through the isolation of active principles or specific chemical group with insecticidal action, among them the alkaloids. The Prosopis juliflora algarobeira presents several substances with insecticidal and antifungal properties. Thus, the objective of this research was to evaluate the insecticidal effect of the alcoholic and aqueous extracts of algarobeira leaves on the black aphid of the common bean Aphis craccivora (Hemiptera: Aphididae). The experiment was carried out in the UAST experimental area. Statistical analyzes were performed by analysis of variance, using the Tukey test with significance level at 5% probability, using the Sisvar 5.6 (2011) computational package. It was observed that the dosages of FAT (100, 50, 25 and 10 mL / L) did not present significant toxicity, where there was no mortality of A. craccivora. Using the aqueous extract of the algaroba, a mortality ranging from 5.94% and 30.12% of the black aphid was observed. It is concluded that the algaroba extract presented low efficiency on the mortality of A. craccivora.