Insecticidal activity of plant extracts on Dysmicoccus brevipes in pineapple.

Dysmicoccus brevipes is an insect that can cause many losses in the culture of pineapple. Thus, it is necessary to study alternative control measures. The objective in this research was to evaluate the insecticidal activity of extracts of Azadiractha indica and Cyperus iria on Dysmicoccus brevipes in pineapple. Tests were carried out on: Colonization of D. brevipes and agronomic aspects of pineapple plants; mortality of this insect by the application of extracts directly and on contact surface. The treatments tested were: 1) Control 1 (water); 2) Control 2 (insecticide Evidence 700 WG); 3 and 4) Aqueous extract of A. indica at 5% and 10% concentrations; 5 and 6) Aqueous extract of C. iria at 5% and 10% concentrations. The design was the completely randomized design with five replicates. The data were submitted to analysis of variance and Scott-Knott test at a 5% probability. It was found that extracts A. indica 10% and C. iria 5% and 10% sprayed once in pineapple plants may adversely affect the D. brevipes population, not interfering in the agronomic aspects of the pineapple crop the initial growth phases. Therefore, have a potential to be used in Integrated Management of Pests associated with other control methods.