The squash vine borer is an early pest who completes its life cycle in the early part of our growing season. Delay planting your squash and zucchini for about 4 to 6 weeks. But remember to give the plants plenty of opportunity to produce before your frost date. I tried it one year and was successful. I do not grow squash and zucchini any longer, so I do not know if it works in successive years.

Squash vine bores are flying insects , not a disease and dont attack tomato plants. If you do plant early you can see the borers inside the vine , just take a pin and stab the caterpillar to kill it . It worked for me on my pumpkin vines one year .

I haven't tried this, but read about it- you can also try floating row covers. Since they are only a threat early in the season, you can just cover the plants until they have flowers and need pollinators. I just recently received an order of Agribon - light fabric that lets in rain and sun - so I may try it this year.