Reproductive Diapause in the Spotted Cucumber Beetle
Abstract
Exposure of newly emerged spotted cucumber beetle (Diabrotica undecimpunctata howardi) females to photophases of 12 and 13 hr and temperatures of 20 and 25@*C inhibited development. Photophases of 12 and 13 hr at 30@*C and 14 hr at 20, 25, and 30@*C resulted in normal ovarian development. Inhibition of ovary development at short photophase continued for 30 to 60 days at 20@*C. This reproductive diapause was induced and maintained by early and continuous exposure to short photophase. No difference in foliage consumption was found between diapausing and non-diapausing beetles.Downloads
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