Tuesday, 19 November 2002
D0455

This presentation is part of : Display Presentations, Section F. Crop Protection Entomology

The development of an IPM strategy for beet armyworm, Spodoptera exigua, in California sugarbeet

David R. Haviland, University of California, Cooperative Extension, Kern Co, 1031 S. Mt. Vernon Ave, Bakersfield, CA, Larry D. Godfrey, University of California, Entomology Department, One Shields Avenue, Davis, CA, and Kevin E. Keillor, University of California, Entomology Department, UC Shafter Research and Extension Center, 17053 North Shafter Ave, Shafter, CA.

Management of beet armyworm has been a topic of concern for growers and pest control advisors of California sugarbeet. Beet armyworm defoliate sugarbeet, as well as feed on the exposed portion of the taproot. This latter damage makes the taproot more susceptible to root rot pathogens. Management of beet armyworm is accomplished, primarily, through applications of chlorpyrofos and methomyl. Growers suggest that these insecticides result in outbreaks of both primary and secondary pests. This research was conducted to determine the factors influencing pest outbreaks and late-season defoliation, and to develop a management strategy for summer beet armyworm populations.

Species 1: Lepidoptera Noctuidae Spodoptera exigua (beet armyworm)
Keywords: threshold, defoliation

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