Since it's a moth that lays the eggs, I would think Bt would be more effective. Best is row covers until they bloom. ----- Original Message ----- From: Diane Roeder <droeder@javanet.com> To: <gardeners@globalgarden.com> Sent: Monday, July 19, 1999 7:07 PM Subject: [gardeners] Another squash question > Greetings, > > My husband the Wize One has advised that I apply rotenone (sp?) now > since the squash borers will be doing their damage soon. I seem to > remember reading that rotenone is no longer considered effective for > them. Is it? Should I? > > Thank- > > Diane, Western Mass, Zone 5 > >