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Effect of Broken Corn on Indianmeal Moth Survivability

Published by the American Society of Agricultural and Biological Engineers, St. Joseph, Michigan www.asabe.org

Citation:  Paper number  056183,  2005 ASAE Annual Meeting . (doi: 10.13031/2013.19641) @2005
Authors:   Nalladurai Kaliyan, Mario A. Carrillo, R. Vance Morey, William F. Wilcke, Colleen A. Cannon
Keywords:   Indianmeal moth, Plodia interpunctella, mortality, survivability, shelled corn, broken corn

Survivability of Indianmeal moth, Plodia interpunctella (Hbner), larvae fed a standard laboratory diet, whole corn with 0% broken kernels, whole corn with 5 to 7% broken kernels, and 100% broken corn kernels were assessed in our laboratory at 28oC, 65% RH, and 14 h light :10 h dark photoperiod cycle. A conventional low-oil yellow dent corn (about 3.9% oil content) and a highoil corn hybrid (about 7.7% oil content) were tested. Survivability was measured as the percentage emergence of pre-pupae, pupae, and adults at the end of the rearing period. For the standard laboratory diet, a mean SD of 97.5% 2.9 larvae survived. The mean SD percentages of larval survival for the conventional low-oil yellow dent corn were 6.7 2.9, 63.8 4.8, and 80.0 14.7 for 0, 7, and 100% broken kernels, respectively. The mean SD percentages of larval survival for the highoil corn hybrid were 28.3 12.6, 81.3 4.8, and 100.0 0.0 for 0, 5, and 100% broken kernels, respectively. Larval growth rate for high-oil corn was faster than for low-oil corn. Results indicate that cleaning corn before storage could reduce Indianmeal moth problems. Also, Indianmeal moth problems in high-oil corn varieties might be slightly greater than in corn varieties with normal oil levels.

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