I have what looks like caterpillar damage on some of my apple trees and my rhubarb plants have been decimated.
I have found the occasional caterpillar on my trees. They're not the green stripe eastern tent caterpillars I've had issues with before as I've learned to kill them in their nests.
I also sprayed BT twice so far this year on the apple trees but I still see leaf damage which looks like caterpillars despite the fact that with very few exceptions I've seen no caterpillars.
if caterpillars where do I look for them?
if not, then what.
any reason not to keep spraying with BT? some other pesticide recommended?
thx in advance for help.