When do adult billbugs typically lay their eggs?

Adult billbugs typically lay their eggs in late spring, which aligns with their life cycle and the seasonal conditions that are conducive for their reproduction. During this time, the environmental conditions such as temperature and moisture levels are generally optimal for the development of their larvae once the eggs hatch.

The timing is crucial because laying eggs too early in the spring might expose the eggs to late frosts, while laying them too late may not provide enough time for the larvae to mature before the onset of cooler autumn temperatures. Late spring offers a balance of warmth and adequate food availability, which is essential for the larvae's successful growth and development. This reproductive strategy helps ensure the survival of the next generation during the peak of favorable conditions in the growing season.