3:02pm

Wed June 13, 2012
-Nature of Things

Highways of Silk

John Weeks talks about Tent Caterpillars and their effect on apple and cherry trees. Weeks explains how these insects, usual thought of as pests, serve a necessary role in the ecosystem. In fact, the Tent Caterpillars are not really harmful to the trees at all.

Originally aired June 19,1987.

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