Abstract
Protein, starch, fat, sucrose, glucose, and fructose contents were analyzed in 22 corn genotypes and correlated with food utilization parameters and indices determined on developing rice weevil, Sitophilus oryzae (L.), reared on each corn genotype. The larval period was reduced and heavier pupae developed from corn with higher glucose content. Increased levels of protein reduced amount of food consumed and increased food utilization efficiency. Larvae reared on pelletized, germless kernels required a longer time to reach pupation, had lower pupal weights and lower food utilization efficiency than did larvae reared on pelletized whole kernels. However, mortality was similar in both treatments indicating that nutrients found in the germ were not essential. A homogenous distribution of nutrients in the food reduced larval development time and increased food utilization efficiency.
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