Also try a butterCUP variety too. They are richer and sweeter tasting. For the vine borers, you can inject into the stems a little Bt mixed with water. Inject using an insulin syringe. There are also benefical nematodes that can also be injected and these do not affect the growth or taste of the squash. I use either one on my squash and have only had powdery and downy mildew on the leaves. Some of the squash vines are over 25 feet long! I also like a shorter bush type squash plant as its easier to manage due to no extended tap roots that can also get a borer into them. The injections are usually done just once during the growing season, and you start near the soil and inject another location about 1-2 feet out only. The mildews are usually carried by cucumber beetles and they have scent lures and sticky traps for them, as well as neem spray which can act like a repellent when sprayed on the leaves, be sure to spray the undersides too!