What causes population cycles of forest Lepidoptera?
Hypotheses for the causes of regular cycles in populations of forest Lepidoptera have invoked pathogen-insect or foliage-insect interactions. However, the available data suggest that forest caterpillar cycles are more likely to be the result of interactions with insect parasitoids, an old argument that seems to have been neglected in recent years.
Depts of Entomology and Natural Resource Sciences, Washington State University, Pullman, WA 99164, USA.
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Berryman