volume 169, issue 1, P145-153 2020
DOI: 10.1111/eea.12942
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Edward W. Evans

Abstract: The yearly timing of the life cycle of a parasitoid is a key element of its life-history strategy. I examine here factors influencing the expression of partial bivoltinism in Tetrastichus julis Walker (Hymenoptera: Eulophidae), a specialist parasitoid introduced to North America to attack its univoltine host, the cereal leaf beetle, Oulema melanopus (L.) (Coleoptera: Chrysomelidae). The varying tendency was assessed of individuals of this gregarious larval parasitoid to either emerge as adults in the same summ…

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