Project Summaries

12-287  Project Manager: P. F. O'Leary


David L. Kerns, LSU Agricultural Center

With a few exceptions, arthropod pests were lower in 2012 than in recent memory. Tarnished plant bugs were particularly low, and although there were a few "hot spots" in the Mississippi Delta areas, most infestations required only 2-3 insecticide applications. Bollworms were similarly low, with most commercial fields averaging a single application on dual-gene Bt cotton. Pyrethroid resistance monitoring indicated that resistance is still prevalent in Louisiana. Because of low pressure from these pests, our research in these areas was likewise restricted. More common pests included: thrips, aphids, and spider mites. Thrips were common and most fields required at least 1 foliar application of insecticide to supplement insecticide seed treatments. Additionally, the thrips populations in some areas were composed of at least 50% western flower thrips; the other common species was tobacco thrips. Western flower thrips tend to be more difficult to manage with insecticides than most other thrips species. Aphids were wide in 2012, and resistance to some neonicotinoid insecticides appears to be common. Spider mites were common and outbreaks occurred most frequently were pyrethoids and/or acephate were utilized for managing other pests.


Project Year: 2012

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