Abstract
Galeruca tanaceti (Linn.) has a summer reproductive diapause followed by autumnal reproductive activities in the same year. A univoltine species, the adults of Galeruca emerge about the first week of June and remain in diapause until the middle of August when the ovarioles are completely undifferentiated. Development and maturation of the terminal oocytes are completed by mid-September, after which the females oviposit successive batches of eggs to the end of November. The interval between successive ovipositions varies between 7–10 days.
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