hoodat
Garden Addicted
Plants are not helpless when attacked by insects. Some of them put off chemical signals into the air to call in the reserves in the form of parasitic wasps when attacked by caterpillars. Here is an interesting article.
http://www.sciencedaily.com/videos/2007/0906-plants_under_attack.htm
http://www.sciencedaily.com/videos/2007/0906-plants_under_attack.htm