Effects of Temperature, Humidity, and Soybean Maturity on Longevity and Fecundity of the Adult Mexican Bean Beetle, Epilachna varivestis123

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Abstract
The effects of temperature, humidity, and plant stage independently, as well as their interactions, on longevity and fecundity of adult Mexican bean beetles were studied. Longevity was not affected by plant stage, but was affected by temperature and humidity, independently, as well as by their interaction. Longevity increased with increasing humidity and decreasing temperature. Fecundity, as measured by 4 parameters (total egg masses, total eggs, egg masses per female per day, eggs per female per day), was affected by temperature, humidity and plant stage. Eggs per mass was affected by plant stage and humidity, but not by temperature (independently). In general, fecundity was highest for beetles reared under intermediate temperatures, high humidity and feeding on mature soybean plants. No eggs were laid at 32°C, regardless of soybean plant stage and humidity.

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