Abstract
The melon thrips, Thrips palmi Karny, is an invasive insect pest that arrived in Miami-Dade County, Florida, USA in 1990. Since its arrival, it has established as a key pest of all vegetable crops in the southern part of Florida. Growers use insecticides of various classes to control this pest but with minimum success due to its development of resistance against various classes of chemical insecticides. Three studies were conducted in commercial fields and Tropical Research and Education Center research fields to evaluate efficacy of chemical insecticides belonging to the classes: neonicotinoid, diamide, spinosyn, organophosphate, pyridinecarboxamide, pyrethroid and carbamate for controlling melon thrips. In the first study, bifenthrin (Brigade®) provided 71% reduction of melon thrips followed by chlorpyrifos (Lorsban®) in combination with esfenvalerate (Asana®). In the second study spinetoram (Radiant®) in combination with tolfenpyrad (Torac®) significantly reduced melon thrips than all other treatments. In the third study, spinetoram provided significant reduction of melon thrips followed by a premixed product (abamectin + cyantraniliprole). This information will be useful to tomato and other vegetable growers to control melon thrips and other thrips on their crops.
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