K2, what you probably have is fall webworms, not tent caterpillars. Here is a website that tells you all you need to know: <A HREF="http://ohioline.osu.edu/hyg-fact/2000/2026.html" target="_new">http://ohioline.osu.edu/hyg-fact/2000/2026.html</A> I realize this website comes from Ohio State (barf), but it does contain good information. For a second site, this one details what insecticides to use: <A HREF="http://ohioline.osu.edu/b504/" target="_new">http://ohioline.osu.edu/b504/</A>