Holes in cabbage leaves are a telltale sign of cabbage worm feeding. Hand remove adults. Look for eggs on the undersides of the leaves.
Signs of Cabbage Worms
By Marie Iannotti, About.com Guide
Cabbage Worm Damamge
Photo: © Marie Iannotti (2008) licensed to About.com, Inc.©2009 About.com, a part of The New York Times Company.
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