BIOLOGICAL MANAGEMENT FOR TRAVEL CONTROL (Thrips tabaci) ONION (Allium cepa L.) INCLUDING EFFECT ON NON-TARGET ORGANISMS.

Abstract

The aim of the stydy was to evaluate the efficiency of four elements (Beauveria bassiana, K2SiO3, orobor and Beauveria bassiana and K2SiO3) to protect onion plants against Thrips attack, to detect if these compounds would influence other arthropods presente in the area, as well as which would result in better growth performance and yield. The trial was conducted in a comercial onion area in the city of Campo Alegre de Goiás (GO) during the 2019 crop. The treatments Beauveria bassiana (Bb), orobor TM N1, K2SiO3 (Si), Beauveria bassiana + K2SiO3 (Bb + Si) and control were arranged in a randomized block design with four repetitions and six applications were performed every 15 days from the 20th day after planting. The number of Thrips present in onion plants, plant height, number of leaves per plant, leaf width, individual bulb mass, bulb diameter and comercial productivity were evaluated and non-target organisms present in each treatment were recorded. The number of Thrips was conted by uprooting the plants and using yellow adhesive traps. Statistical analyzes were performed in the R program. Treatment with Beauveria bassiana and potassium silicate application provided the best yields and the lowest population reduction in non-target organisms, thus respscting the principle of integrated pest management