Abstract
The objective of this study was to determine the effect of age, body size and sex on feeding rate of the predatory coccinellid Cryptolaemus montrouzieri Mulsant (Coleoptera: Coccinellidae). The body size of the adult C. montrouzieri did not influence the feeding rate in either sex and the large body size was more common in both sexes. A significant increase in feeding (4.64 mealybugs/ day) and excretion (47.91 excreta deposits/ day) was observed in females compared with males (2.47 mealybgs/ day and 25.78 excreta deposits/ day, respectively) under mated conditions. The feeding rate throughout adulthood showed an inverse trend with age in both sexes and the curvilinear relationship explained much of the variability in the feeding response in relation to age. The feeding differences in relation to age, body size as well as sex of adult C. montrouzieri are discussed in detail.
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