Zucchini rotting on the vine
We have a large, full, zucchini plant that has blossoms. It started a zucchini then at about 3" shriveled and rotted on the vine. Container gardening, organically treated for white fly and aphids, etc. Why are they not developing into a full zucchini?
It sounds like you have vine borers. This article will help:https://www.gardeningknowhow.com/edible/vegetables/squash/squash-pests-identifying-and-preventing-squash-vine-borer.htm