Ecology and Management of the Western Bean Cutworm (Lepidoptera: Noctuidae) in Corn and Dry Beans

Abstract The western bean cutworm, Striacosta albicosta (Smith) (Lepidoptera: Noctuidae), is historically a pest of both corn (Zea mays L. (Poales: Poaceae)) and dry beans (Phaseolus sp. L. (Fabales: Fabaceae)) in the western Great Plains. However, it has recently undergone an eastward range expansion establishing itself across the Corn Belt in 25 states and 4 Canadian provinces. To mitigate the effects of infestation in Michigan, foliar insecticides are used in dry beans, whereas management of the pest in corn relies more heavily on the use of Bt-expressing hybrids. In this study stable carbon isotope analysis was used to determine what crop adult moths developed on as larvae with analysis showing that very few of the adult moths developed on dry beans. These results suggest that beans and corn are not suitable as co-refuges and that mainly adults which developed on corn are contributing to the next generation of western bean cutworm in Michigan.

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Contribution of larvae developing on corn and dry beans to the adult population of western bean cutworm in Michigan

10.1101/2020.06.19.162016 ◽

2020 ◽

Author(s):

Dakota C. Bunn ◽

Eduardo Dias de Oliveira ◽

Frederick Springborn ◽

Miquel A. Gonzalez-Meler ◽

Nicholas Miller

Keyword(s):

Great Plains ◽

Adult Population ◽

Stable Carbon Isotope ◽

Isotope Analysis ◽

Dry Beans ◽

Stable Carbon Isotope Analysis ◽

Western Bean Cutworm ◽

Canadian Provinces ◽

Western Great Plains ◽

Lepidoptera Noctuidae

AbstractThe western bean cutworm, Striacosta albicosta (Smith) (Lepidoptera: Noctuidae), is historically a pest of both corn (Zea mays L.) and dry beans (Phaseolus sp L.) in the western Great Plains. However, it has recently undergone an eastward range expansion establishing itself across the Corn Belt in twenty-five states and four Canadian provinces. To mitigate the effects of infestation in Michigan, foliar insecticides are used in dry beans whereas management of the pest in corn relies more heavily on the use of Bt-expressing hybrids. In this study stable carbon isotope analysis was used to determine what crop adult moths developed on as larvae with analysis showing that very few of the adult moths developed on dry beans. These results suggest that beans and corn are not suitable as co-refuges and that mainly adults which developed on corn are contributing to the next generation of western bean cutworm in Michigan.

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Ecological and behavioral studies of the western bean cutworm (Lepidoptera: Noctuidae) in corn

10.31274/rtd-180813-15943 ◽

2007 ◽

Author(s):

David Lee Dorhout

Keyword(s):

Behavioral Studies ◽

Western Bean Cutworm ◽

Lepidoptera Noctuidae

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Ecology and Management of the Western Bean Cutworm (Lepidoptera: Noctuidae) in Corn and Dry Beans—Revision With Focus on the Great Lakes Region

Journal of Integrated Pest Management ◽

10.1093/jipm/pmz025 ◽

2019 ◽

Vol 10 (1) ◽

Cited By ~ 5

Author(s):

Jocelyn L Smith ◽

Christina D Difonzo ◽

Tracey S Baute ◽

Andrew P Michel ◽

Christian H Krupke

Keyword(s):

Great Lakes ◽

Great Plains ◽

Geographic Range ◽

Economic Damage ◽

Great Lakes Region ◽

Dry Beans ◽

Eastern Canada ◽

New Information ◽

Western Bean Cutworm ◽

Western Great Plains

Abstract The western bean cutworm, Striacosta albicosta (Smith) is a native North American pest of corn and dry beans. The historical geographic range of the western bean cutworm covered the western Great Plains states including Colorado, Nebraska, and Wyoming. Since 1999, the geographic range of the western bean cutworm has rapidly expanded eastward across the U.S. Corn Belt and eastern Canada, causing significant and economic damage to corn Zea mays (L.) and dry edible beans Phaseolus spp., in parts of this region. Since 2010, increasing challenges related to managing this pest in its new range prompted numerous research studies that provided new insights into the biology and management of western bean cutworm. This revision of a previous Journal of IPM profile summarizes new information regarding the ecology and biology of western bean cutworm, and discusses updated recommendations for scouting and management in corn and dry beans, with an emphasis in the expanded geographic range of the Great Lakes region.

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