EFICIÊNCIA DE BIOINSETICIDA E INSETICIDA NATURAL NO CONTROLE DE PULGÃO VERDE (Myzus persicae) EM COUVE-MANTEIGA (Brassica oleracea var. acephala)

Abstract

The objective of this work was to evaluate the efficiency of bioinsecticide and natural insecticide in the control of the green aphid, Myzus persicae, in collard greens (Brassica oleracea var. acephala). The experiment was carried out in the Biology laboratory of the Instituto Federal Goiano – Campus Posse in a controlled environment. The insecticides used were Isaria fumosorosea, natural insecticide neem oil (1.5 ml), synthetic chemical insecticides Imidacloprid, Acetamiprid + Pyriproxyfen and the control treatment. The leaf sections were soaked in the syrup of the respective insecticide or bioinsecticide and placed in a Petri dish, then five nymphs were transferred to each Petri dish. The efficiency and mortality of each treatment was evaluated days after application (DAA), being performed at 1, 3, 7 and 9 DAA. The experimental design was completely randomized, with 8 replications. Insecticides (Imidacloprid, Acetamiprid + Pyriproxyfen) were more efficient in controlling Myzus persicae in cabbage leaves, this efficiency was 100% at 9 DAA, followed by neem oil and Isaria fumosorosea. Although biological insecticides are less efficient, azadirachne treatment did not show significant differences when compared to chemical ones. Therefore, these insecticides can be alternatives to control Myzus persicae in collard greens.

Keywords: green aphid, natural control, bioinsecticide, Brassica oleracea.