Abstract
Progeny production and duration of development of rusty grain beetles, Cryptolestes ferrugineus (Stephens), maintained at 43 and 75% RH were determined on whole and cracked corn. Number of progeny produced per female per day of oviposition ranged from 0 on whole corn maintained at 43% RH to 2.2 on coarsely cracked corn maintained at 75% RH. Duration of development ranged from 6.1 weeks on coarsely cracked corn maintained at 75% RH to 12.0 weeks on whole corn maintained at 43% RH. Progeny production was generally greatest and duration of development was generally shortest at 75% RH. Progeny production increased and duration of development decreased as particle size of cracked corn increased at 75% RH. Few progeny were produced on whole kernels.
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