ARS | Publication request: CABBAGE LOOPER, TOBACCO BUDWORM, AND BEET ARMYWORM LARVAL MORTALITIES, DEVELOPMENT AND FOLIAGE CONSUMPTION ON BT AND NON-BT COTTONS

Submitted to: University of Arizona Agricultural Experiment Station
Publication Type: Experiment Station
Publication Acceptance Date: February 15, 2003
Publication Date: June 1, 2003
Citation: HENNEBERRY, T.J., JECH, L.J., DE LA TORRE, T.M. CABBAGE LOOPER, TOBACCO BUDWORM, AND BEET ARMYWORM LARVAL MORTALITIES, DEVELOPMENT AND FOLIAGE CONSUMPTION ON BT AND NON-BT COTTONS. UNIVERSITY OF ARIZONA AGRICULTURAL EXPERIMENT STATION. 2003. pp. 189-196.

Technical Abstract: Tobacco budworm (TEW), Heliothis virescens (F.), larvae were highly susceptible to feeding on Et cotton leaves or flower buds with 100% and 96% mortality occurring within 4 days, respectively, compared to an average mortality of 95% for cabbage looper (CL), Trichoplusia ni (Hubner), and 57% for beet armyworm (BAW), Spodoptera exigua (Hubner), after 14 days feeding on Bt leaves. Larval weights, of CL and BAW after 7, 10, or 14 days of feeding on Bt leaves were lower compared with those feeding on non-Bt cotton leaves. BAW, CL, and TBW larvae consumed significantly less Bt leaf area per feeding day compared with DPL 5415.