Tuesday, 16 November 2004 - 9:48 AM

Management of insect pests on Bt cotton in southeast Missouri

Michael L. Boyd, boydm@missouri.edu, University of Missouri-Columbia, Entomology, University of Missouri Delta Center, 147 State Hwy T, Portageville, MO

Before the initiation of Missouriís boll weevil eradication program and the major tobacco budworm, Heliothis virescens (Fabricius), outbreak during the 2002-growing season, a limited amount (15 percent or less) of the stateís cotton acreage was planted to Bt varieties. Since then Bt cotton varieties have been used on 65 percent or more of Missouriís acreage. As a consequence of reduced insecticide oversprays targeting the boll weevil and lepidopteran pests, management of piercing-sucking pests such as aphids and particularly plant bugs have become more important. In 2003, Missouri cotton producers spent over 5.2 million dollars to combat plant bug infestations, but still lost over 1.6 million pounds of cotton to these pests. The intent of this presentation is to summarize the latest extension management recommendations and field research results for plant bugs in southeast Missouri.

Species 1: Hemiptera Miridae Lygus lineolaris (Tarnished plant bug)
Species 2: Hemiptera Aphididae Aphis gossypii (Cotton aphid)
Keywords: Cotton, Bacillus thuringiensis

[ Recorded presentation ] Recorded presentation

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