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Fall webworm
The fall webworm (''Hyphantria cunea'') is a moth in the family Arctiidae known principally for its larval stage, which creates the characteristic webbed nests on the tree limbs of a wide variety of hardwoods in the late summer and fall. It is mainly an aesthetic pest, and is not believed to harm otherwise healthy trees. It is well known to commercial tree services and arboriculturists.
==Range==
The moth is native to North America, ranging from Canada to Mexico, and is one of the few insect pests introduced from North America into other continents. Introduced to what was formerly Yugoslavia in the 1940s (firstly recorded in 1949), it now has occupied probably its entire range in Europe from France to the Caspian Sea in the east, as well as penetrates into Central Asia: Turkmenistan (from 1990-1993), Uzbekistan (Fergana valley from 1996-1997), Kyrgyzstan, and southeastern Kazakhstan. It was also introduced into Japan in 1945, and has adjusted its number of generations per year since its arrival. It spread into China, southern Mongolia, Korea and southern Primorsky Krai of Russia, so now is considered holarctic in distribution.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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