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Melittia cucurbitae
The adult borer resembles a wasp. It is about 1/2 inch long with an orange abdomen with black dots.
Thank you Keith and Ryan - I agree you totally nailed it. I wasn't even thinking moth. Thanks for the help.
I agree it's called a white moth and they lay their eggs at the base of squash and other vine plants. The grubs that hatch eat the stem from the inside making it all mushy. A fine netting covering the bottom 8-10 inches of vine to the ground will be sufficient to save the plants.