In the North, squash vine borer moths are laying eggs in late June and early July. In the South, they emerge in May and there can be up to two generations per year and moths may continue to lay eggs through mid-August.

How do you kill vine borer eggs?

If you can find the entrance holes and “sawdust,” try inserting a wire and thread it through the stem for some distance to kill the larvae inside. Sprinkle diatomaceous earth around the stalks when the squash vines are small or the threat of squash vine borers is high (early to mid-summer). Reapply after rain.

Where do squash vine borers lay their eggs?

Eggs: The eggs of the squash vine borer are laid singly on the lower part of the main stem of the host plant, as well as on the leaf stalks, leaves, and fruit buds. Some eggs are laid in the cracks in the soil near the base of the plant (Canhilal et al. 2006).