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Siberian Silk Moth - Dendrolimus superans 

In its native range of northern Asia, Dendrolimus superans, can be a very serious and destructive pest of larches (Larix spp.) and soft 5-needled pines (Pinus spp.), but other conifers may also be attacked. During major outbreaks which occur every 8 to 11 years the larvae can defoliate hundreds of thousands of hectares. The unusual and complex lifecycle of this pest has made it very difficult to control in it's native range. There are 3 known subspecies of this pest, D. superans superans which occurs only in Japan, D. superans albolineatus which occurs on the Sakhalin and Kuril islands and D. superans sibiricus which is widespread on the Asian continent.