Budworm/Bollworm Management: Insecticide Resistance and Population Trends in the Mid-South

Jerry B. Graves, Gary W. Elzen, M. Blake Layton, Ron H. Smith, Marvin L. Wall


 
ABSTRACT

Tobacco budworm populations generally were lower in the Mid-South than in recent years. Exceptions were central Alabama and southeastern Arkansas. Although resistance to carbamates, organophosphates and pyrethroids was documented in Alabama, Arkansas, Louisiana and Mississippi, overall levels of resistance to these three classes of insecticides remained stable of decreased in 1994 in comparison to previous years. As a result of generally lower populations and stable or decreased levels of resistance, field control of tobacco budworm generally was satisfactory with all classes of insecticides in the Mid-South. However, considerable field control problems occurred in central Alabama where populations of tobacco budworm were unusually high and resistance to insecticides was documented for the first time. Bollworm populations generally were higher and persisted longer than usual in most areas of the Mid-South. However control of bollworms in the field was good to excellent with pyrethroids. Monitoring data indicate no clear and convincing evidence of resistance to the pyrethroids in bollworms in the Mid-South.



Reprinted from 1995 Proceedings Beltwide Cotton Conference pp. 136 - 140
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998