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The eastern tent caterpillar (Malacosoma americanum) is a species of moth in the family Lasiocampidae, the tent caterpillars or lappet moths. It is univoltine , producing one generation per year. It is a tent caterpillar , a social species that forms communal nests in the branches of trees.
Bagworm, Fall Webworm or Eastern Tent Caterpillar? Archived 2014-08-20 at the Wayback Machine, August 18, 2001. Sandra Mason, University of Illinois Extension. Accessed May 31, 2010. Bagworm Control, Photos and Video from University of Nebraska-Lincoln Extension Archived 2019-12-02 at the Wayback Machine; Bagworm fact sheet from Penn State
Immediately after feeding the caterpillars return to the tent and aggregate in sunlight to facilitate the digestive process. Thus, eastern tent caterpillars are central place foragers. In contrast, the forest tent caterpillar is a nomadic forager that establishes a series of temporary resting sites during the course of its larval development.
The forest tent caterpillar moth (Malacosoma disstria) is a moth found throughout North America, especially in the eastern regions. Unlike related tent caterpillar species, the larvae of forest tent caterpillars do not make tents, but rather, weave a silky sheet where they lie together during molting .
The spores of this snowy white fungus are dispersed in locations where the caterpillars pass by or where they pupate. The mycelium of B. bassiana grows radially out from the body of the caterpillar, turning the caterpillar soft and mushy. It has a killing rate of 13.1% in caterpillars. B. bassiana grows favorably in humid and warm environments.
Cocoons of Cotesia species with the remains of a dead parasitized caterpillar Larvae of Cotesia glomerata emerging from a caterpillar of a Pieris brassicae butterfly. The adults of Cotesia glomerata can reach a length of 3–7 millimetres (0.12–0.28 in). This small braconid wasp is black, with two pairs of wings.
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