Abstract

The efficacy of 14 different insecticides was tested for the control of onion thrips Thrips tabaci (Lindeman, 1889) on onion in Itajaí Valley, SC during 2018. The insecticides were sprayed six times at intervals of about seven days, we evaluated the number of nymph of thrips per plant 48 hours after spray, visually rated for thrips damage at 96 DAT and total and commercial onion bulb production. Significant diferences were observed between various insecticides evaluated. The treatments formetanate hydrochloride, spinetoram and abamectin proved the best thrips control, less thrips damage and good total and commercial productivity. The insecticide profenofos + cypermethrin exhibited reduction of thrips nymph and better total and comercial production comparing control however not reduced thrips damages. The insecticides thiacloprid, thiamethoxam + lambda-cyhalotrin, and Imidacloprid reduced the thrips density but had similar results for thrips damages and onion bulb production comparing with control, excepting total productivity for the neonicotinoids thiacloprid and and Imidacloprid.

Highlights

  • Evaluation of insecticides for the control of Thrips tabaci (Lindeman, 1889) (Thysanoptera: Thripidae) on onion field Abstract

  • The efficacy of 14 different insecticides was tested for the control of onion thrips Thrips tabaci (Lindeman, 1889) on onion in Itajaí Valley, SC during 2018

  • The insecticides were sprayed six times at intervals of about seven days, we evaluated the number of nymph of thrips per plant 48 hours after spray, visually rated for thrips damage at 96 DAT and total and commercial onion bulb production

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Summary

Contribuições dos Autores

L.D.G., P.A.S.G. e R.S.R. contribuíram para o delineamento e implantação da pesquisa, análise dos resultados e preparo do manuscrito. Combate químico de Thrips tabaci (Thysanoptera: Thripidae) en el cultivo de cebolla en Morelos, México. Evaluation of different insecticides for the management of onion thrips (Thrips tabaci Lindeman, 1889) (Thysanoptera, Thripidae) on onion (Allium cepa L.) crops (2018). Onion thrips (Thysanoptera: Thripidae): A global pest of increasing concern in onion. Onion thrips (Thysanoptera: Thripidae) biology, ecology, and management in onion production systems. Controle químico de Thrips tabaci na cultura da cebola. Australian population of onion thrips, Thrips tabaci Lindeman (Thysanoptera: Thripidae), are resistant to some insecticides used for their control. Regional and temporal variation in susceptibility to lambda-cyhalothrin in onion thrips, Thrips tabaci (Thysanoptera: Thripidae) in onion fields in New York. Inseticidas (tratamentos) avaliados para o controle de Thrips tabaci em cebola.

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