Alabama Cotton: Impact of Seedling Thrips Control During Bloom

Thrips injury on young cotton. ©Debra L Ferguson Stock Images
The Auburn Cotton Entomology team conducted several research trials in 2020 to help us continue to refine the “Cotton IPM System.” Attached is a short summary of some of our at-plant management trials. We tested several insecticide seed treatments (IST) and in-furrow treatments at Prattville and Belle Mina.

Overall, treatments performed well and generally kept thrips injury below threshold. Moving into 2021, our recommendation is to either use an imidacloprid based IST (e.g. Gaucho, Aeris, Avicta Elite) or an in-furrow application of imidacloprid, acephate or aldicarb. One consideration for acephate is rain fastness. Even when soil applied at planting, excessive rainfall can leach acephate out of the rootzone and lead to less than ideal efficacy. Use the The Thrips Infestation Predictor for Cotton and scout fields to help determine when a foliar application may be necessary to supplement at-plant treatments. More information about the CottonTIP can be found here. For more information about thrips, check out our new publication, Pests of Alabama Cotton: Thrips (ANR-2718).   (Graham and Smith)




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