ANGULAÇÃO FOLIAR E SUA RELAÇÃO NO MANEJO DE TRIPES

Abstract

The leaf angle formed between plant growth structures in garlic plants is an important phenotypic marker of resistance against thrips. Smaller leaf angles indicate greater protection favorable to Thrips tabaci (Thysanoptera: Thripidae), an insect with a recognized thigmotactic habit. While larger angles indicate less preference of this insect. For greater exposure to natural enemies as well as abiotic factors. The aim of the present study was to evaluate the effect, alone or in combination, of Beauveria bassiana and potassium silicate on leaf angulation in garlic plants, for three consecutive seasons (2017, 2018 and 2019). The treatments (T1) Beauveria bassiana - Bb, (T2) Potassium Silicate - SilK, (T3) Chlorfenapyr - insecticide/acaricide, (T4) Bb+SilK (under binary tank mixing) and (T5) absolute control (water only ) were arranged in a DBC with four replications per season. The experimental activities were carried out in an area of commercial production (Fazenda Paineiras, Lot 5) of noble garlic (cv. Ito) located in the municipality of Campo Alegre de Goiás (southeast of the state of Goiás, Brazil). Bb+SilK promoted adequate leaf angulation to reduce the support capacity of garlic plants against thrips colonization.