CONTROLE DE Tetranychus urticae KOCH (ACARI: TETRANYCHIDAE) EM TOMATE PARA PROCESSAMENTO INDUSTRIAL EM GOIÁS

Abstract

The two-spotted mite, Tetranychus urticae, has been identified as one of the main pests of tomato plants for industrial processing in the central region of Brazil, especially in the state of Goiás. Some control options for this pest are difficult to adopt as a management strategy due to the extensive areas of cultivation, especially in the driest time of the year. The objective of the present study was to evaluate the efficiency of different types of chemical products available on the market, including plinazolin® Technology in two doses through a commercial mixture of an avermectin (emamectin benzoate) and an isoxazoline (isocycloseram). The experimental design was in randomized blocks, with eight treatments and four replications. The treatments were: (T1) absolute control (water only), (T2) plinazolin+emamectin benzoate at a dose of 150 ml ha-1, (T3) plinazolin+emamectin benzoate at a dose of 200 ml ha-1, (T4) lufenuron+emamectin benzoate, (T5) spinetoram, (T6) chlorfenapyr, (T7) indoxacarb and (T8) cyantraniliprole+abamectin. The mite population was counted per leaf and leaflet at 107, 114, 121 and 128 days after transplanting. The plinazolin 200 treatment reduced the estimated average number of mites per leaflet from 9.18 to 3.20. In plinazolin 150 this reduction was to 4.68. Both treatments maintained the mite population below the estimated average value for the longest period of time observed (75%). The evaluation of control efficiency is relevant because it presents promising alternatives as observed in the present study, providing options for rotating active ingredients for the chemical control of mites incident on tomato plants for industrial processing.