K.D. Emfinger1, P. P. Price1, J. H. Temple2, L. Bommireddy2, K. Fontenot2, J. Hardke2, Kelly V. Tindall3, and B. R. Leonard1. (1) LSU AgCenter, Macon Ridge Station, 212 Macon Ridge, Winnsboro, LA 71295, (2) LSU AgCenter, Dept. Of Entomology, 404 Life Science Bldg., Baton Rouge, LA 70803, (3) Univ. of Missouri, P. O. Box 160, Portageville, MO 63873
Field trials were performed in
Louisiana during 2005-2007 to determine the efficacy of WideStrike in selected cotton lines against Lepidopteran pests. Cotton varieties expressing the WideStrike traits as well as parental non-WideStrike cotton lines were exposed to season-long native infestations of insect pests. WideStrike performance was measured by recording the cumulative numbers of damaged and larval-infested fruiting forms, defoliation by foliage-feeding pests, and seed cotton yields. WideStrike cotton varieties experienced significantly less injury and produced higher yields in the presence of persistent pest infestations compared to that for conventional non-WideStrike varieties. These results confirm the success of WideStrike against a Louisiana’s pest complex and demonstrate that an additional transgenic Bt tool is available for cotton IPM.