I live in Ontario and have been Battling vine borers since early July. I was curious as to when I can just let it go. I have performed surgery on my plants about 30 times removing about 50 borers and after a couple of days of perky pumpking leaves they droop again and I go back into surgery mode. Now its the end of August and I just dug out 6 more borers and I am wondering when these buggers leave the plant and I can stop worrying?
Certified GKH Gardening Expert
Your best bet is to use an insecticide on them.