Hi Bigpike-according to Rodale's Garden Problem Solver book for Vegetables, Fruits, and Herbs by Jeff Ball. The moldiness is a symptom of too much moisture. The remedy is to grow them on a trellis, or by propping up an existing plant with boards under the stems.
Here is the paragraph on Squash Vine Borer.
Sudden wilting of all or part of a squash vine can be caused by squash vine borers. You can tell borers are at work by the moist, sawdustlike debris, called frass, piled up outside their small holes. Squash vine borers are fat, white caterpillars with brown heads, about 1 inch long. They tunnel into the stem to feed. The adult is an orange and black clear winged moth with black stripes on its abdomen. It lays brown, flat eggs on the stem.
I have trouble with the Squash Bug every year (a different species). I just found an infestation this morning as a matter of fact. Seven dust is what I use when I find them. The book recommends an insecticidal soap every 2 to 3 day for 2 weeks.
Squash Bug
The leaves on plants infected with squash bugs wilt, dry up, and turn black. The damage increases until the vine dies. Adult squash bugs are flat backed, shield shaped, brown to black bugs with a light colored outline on their abdomens. The are 1/2 to 3/4 inch long and lay brown or red shiny eggs on the undersides of leaves.
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