Life-Cycle Synchronization in Chrysolina aurichalcea (Coleoptera: Chrysomelidae) to Its Host Artemisia princeps: Effects of Host-Leaf Age on Survival.

概要

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To investigate the effect of host-leaf age on the survival of Chrysolina aurichalcea, larvae and adults were reared on Artemisia princeps leaves of three different growing ages (young, mature and senescent). For adult longevity and fecundity, mature leaves were the most suitable despite of the beetles' preference for young leaves. When larvae were fed with senescent leaves, their growth rate decreased and mortality increased. On the other hand, 1st instar larvae did not show a clear preference towards young leaves, and those released under planted hosts could not develop into the next instar when the plant was taller than 10 cm. Therefore, the need to synchronize the egg hatching to host sprout emergence in early spring may have evolved into a unique life cycle of autumn breeding.
日本応用動物昆虫学会の論文