Zucchini is a summer squash and thus can cross-pollinate with other summer squash varieties
They are harvested when the skin has matured to a tough rind, and the seeds are mature.
This species is also known as the bottle gourd. Its fruit can be up to 2 feet in length and 3 inches wide. It has gray or brown, mottled skin.
Cucumbers (Cucumis sativus) Melons (Citrullus lanatus) Butternut (Cucurbita moschata) Korean Zucchini (Cucurbita moschata) Cantaloupe (Cucumis melo) Eggplant (Solanum melongena)
Net or Cage
Time
Distance
separate varieties by distance; this is primarily a function of the size and vigor of the crop.
You need to separate varieties by time. This is primarily a function of the length of the flowering period for each variety.
Netting the entire plant will help keep insects like bees away from your cucurbits and thus prevent cross-pollination.