Journal of Economic Entomology (2001) 94, 1353-1360

Mohammad A. Al-Deeb, Gerald E. Wilde and Kun Yan Zhu (2001)
Effect of insecticides used in corn, sorghum, and alfalfa on the predator Orius insidiosus (Hemiptera: Anthocoridae)
Journal of Economic Entomology 94 (6), 1353-1360
Abstract: Orius insidiosus (Say) is an important predator in corn, sorghum, and alfalfa. Foliar insecticides commonly used on corn (permethrin, bifenthrin, and fipronil); sorghum (chlorpyrifos, carbofuran, dimethoate, and cyfluthrin); and both crops (lambda-cyhalothrin and ethyl parathion) were evaluated in 1998 and 1999 for their residual effects on O. insidiosus by caging adults on treated plants at several time intervals: at application (day 0) and 2, 3, and 6 d after application. In addition, imidacloprid, fipronil, and thiamethoxam used as seed treatments on corn and sorghum were tested for their effects on O. insidiosus by caging adults on plants in the presence and absence of greenbugs, Schizaphis graminum (Rondani). Finally, six of the same insecticides that also are used on alfalfa were evaluated in the field for their effects on O. insidiosus and other insects. On day 0, ethyl parathion, bifenthrin, and ]lambda]-cyhalothrin on corn caused significantly higher mortality to O. insidiosus than permethrin and fipronil. Ethyl parathion and carbofuran on sorghum caused significantly higher mortality than chlorpyrifos, dimethoate, and lambda-cyhalothrin, which differed significantly from the control. Mortality with cyfluthrin did not differ significantly from that in the control. Insecticides had no significant effects on O. insidiosus 3 and 6 d after application in 1998 with the exception of permethrin on day 3. Similar patterns of mortality were observed in 1999 experiments. No significant differences in mortality of adults occurred with fipronil and thiamethoxam in the presence and absence of greenbugs. Imidachloprid caused significantly higher mortality to O. insidiosus adults than thiamethoxam or fipronil in some instances when greenbugs were not supplied as food. In alfalfa, the insecticides caused significant mortality to most of the insects evaluated. Ethyl parathion, permethrin, chlorpyrifos, and cyfluthrin caused significantly higher mortality to O. insidiosus than carbofuran and lambda-cyhalothrin, which differed significantly from the control in 1998. In 1999, all treatments significantly reduced O. insidiosus numbers and did not differ significantly from each other.
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Link to article at publishers website
Database assignments for author(s): Kun Yan Zhu, Mohammad Ali Al-Deeb

Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
health/environmental effects of pesticides
Research topic(s) for beneficials or antagonists:
resistance to pesticides

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Schizaphis graminum	Maize/corn (Zea mays)
	Schizaphis graminum	Sorghum (crop)
Orius insidiosus (predator)	Schizaphis graminum	Maize/corn (Zea mays)
Orius insidiosus (predator)	Schizaphis graminum	Sorghum (crop)