Abstract
The effects of the patterns of within-stage survival and feeding rates on modeling foliage consumption were evaluated with a computer simulation model for the immature stages of Mexican bean beetle, Epilachna varivestis Mulsant, on dry beans, Phaseolus vulgaris L. Feeding and survival rates were simulated as linear and nonlinear functions of degree-days. Constant and linear age-specific feeding rates within a developmental stage were found to result in different levels of daily consumption. Different types of survival within a developmental stage also greatly altered the amount of daily and total consumption. More importantly, the interaction between survival and feeding patterns resulted in a difference of up to 40.04% of total stage foliage consumption. These results suggest the importance of incorporating within-stage feeding and survival patterns in insect simulation models.
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