FEATURES OF THE FAR EASTERN POPULATION OF LYMANTRIA DISPAR L. OUTBREAK
D. K. Kurenshchikov1, V. V. Martemyanov2,3, E. L. Imranova1
1Institute for Aquatic and Ecological Problems of FEB RAS, Khabarovsk, Russia
2Institute of Systematics and Ecology of Animals of SB RAS, Novosibirsk, Russia
3Biological Institute, National Research Tomsk State University, Tomsk, Russia
Keywords: Хабаровский край, Россия, динамика популяций, Lymantria dispar, эруптивная фаза, вспышка численности, Khabarovsk territory, Russia, population dynamic, Lymantria dispar, eruptive phase, outbreak
Abstract
Lymantria dispar features of a population at the peak phase in Far East territory are presented. We studied the death of insects based on biotic factors (parasitoids, nuclear polyhedrosis virus), the sex ratio, masses of male and female pupae, and female’s fecundity. We show that the main reason for population collapse was nucleopolyhedrovirus. It appeared no cadavers died from entomopathogenic fungi. A strong decrease in the proportion of females was partially mediated by sex-specific parasitism, moderate fecundity, and a high rate of virus-induced mortality was responsible for the fast decline of L. dispar population density in Far East territory.
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