Dinâmica populacional e testes de controle agroecológico de Dysmicoccus brevipes em abacaxi da cultivar Turiaçu

Abstract

Pineapple is the main agricultural product in Itacoatiara-AM, with main production areas in Novo Remanso and Vila do Engenho. Among the pests that occur in the crop, Dysmicoccus brevipes (Cockerell, 1893) stands out, causing the plants to6 weaken and acting as a vector. The aim of the study was to establish the population dynamics of this pest in pineapple cultivation and evaluate the efficiency of agroecological products for its control. The studies were conducted in the community of Novo Remanso, in two plantations. The dynamics was studied in one of the plantations over a 12-month period. The population was related to some abiotic factors to identify which parameter most contributes to the pest's dynamics. In the second planting, the efficiency of agroecological products for pest control, used in one and two applications, was evaluated. The natural occurrence of the pest started in March, with a population peak in the months of April to June. The abiotic factor that most influenced the dynamics was the relative humidity of the air, with the pest population increasing in periods of higher humidity. As for the efficiency of the agroecological products tested, both the lime-sulfur and the neem ethanol extract were efficient with one and two applications, with better results after two applications, especially for the lime-sulfur. Thus, the most favorable time for the occurrence of D. breveps in the study region are the months of higher relative humidity and, for agroecological control, the lime-sulfur presents better efficiency.