Biological factors which regulate the number of <i>Eriogaster lanestris</i> L. (Lepidopera, Lasiocamipidae)
The Eurasian lappet moth Eriogaster lanestris L. is rather rare the Novosibirsk region, where, according to our research, it is mainly regulated by a bristle fly, whose larvae can infect up to 94.0 % of the caterpillar cobweb nests. Furthermore, 6.0 % of caterpillar mortality was caused by the bacterium Bacillus thuringiensis and the fungus Beauveria bassiana. Thus, biological factors such as entomophagous, entomopathogenic bacteria and fungi are able to completely destroy the population of lappet moth caterpillar.