Description: White larva with brown head, up to 1″ long.
Preferred foods: pumpkin, squash, cantaloupe, cucumber
and gourd vines. A small pile of “sawdust” where the
vine meets the soil is a sure sign that you have squash
vine borers. Once you notice the first “sawdust,” it
will not be long until the leaves wilt and the vine
dies. Standard procedure is to slit the base of the
vine with a razor blade and try to extract the borer
larvae, but expect reduced vine size and productivity.
Solution: When vines
start to run, dust weekly 5 or 6 times with Rotenone/Copper Combo. If borers
have already entered the vine, instead of slitting the
vine, use a garden syringe to inject Grub-Away Nematodes at 4″ intervals
over the first 3 ft. of vine, 5,000 nematodes per injection.
Adult moths lay eggs from late June to early August;
covering with a Super-Light Insect Barrier during
this time will significantly reduce borer damage. (Pull
back cover to allow for pollination.)