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United States Department of Agriculture

Agricultural Research Service

Research Project: BIOLOGY AND ECOLOGY OF COTTON PESTS EMPHASIZING MANAGEMENT OF BOLL WEEVILS Title: Efficacy of Vip3A and Cry1Ab transgenic traits in cotton against various lepidopteran pests

Authors
item Adamczyk, John
item Mahaffey, J - DELTA AND PINE LAND CO.

Submitted to: Florida Entomologist
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: October 29, 2008
Publication Date: December 1, 2008
Citation: Adamczyk Jr, J.J., Mahaffey, J.S. 2008. Efficacy of Vip3A and Cry1Ab transgenic traits in cotton against various lepidopteran pests. Florida Entomologist. 91(4):570-575.

Interpretive Summary: From 2004 through 2005, experimental cotton varieties that had been genetically engineered to express proteins lethal to various caterpillar pests were evaluated in the laboratory and in the field. Cotton plots of experimental cotton lines containing the vegetative insecticidal protein, Vip3A; '-endotoxin, Cry1Ab; and both Vip3A and Cry1Ab were evaluated for efficacy against certain caterpillars. Results showed that some proteins with insecticidal properties were more lethal to certain caterpillars than others. The cotton line containing Vip3A was more active against certain armyworms compared to the Cry1Ab cotton line; however, the Cry1Ab cotton line was more active against the tobacco budworm compared to the cotton line containing Vip3A. Both the Vip3A and Cry1Ab cotton lines provided similar mortality against the bollworm.

Technical Abstract: From 2004 through 2005, plots of experimental transgenic cotton lines containing the vegetative insecticidal protein, Vip3A; '-endotoxin, Cry1Ab; and both Vip3A and Cry1Ab were evaluated for efficacy against certain lepidopteran pests. Results showed that the cotton line containing Vip3A was more efficacious against the beet and fall armyworm compared to the Cry1Ab cotton line; however, the Cry1Ab cotton line was more efficacious against the tobacco budworm compared to the cotton line containing Vip3A. Both the Vip3A and Cry1Ab cotton lines provided similar mortality against the bollworm. No synergism between Vip3A and Cry1Ab was observed.

Last Modified: 7/22/2014
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