Squash Wilt

Question

Half of the plants look great, but the little squashes wilt after they get about 3 inches long.

Answer 1

Most likely this is due to a pollination issue. The following articles should be of some help to you: https://www.gardeningknowhow.com/edible/vegetables/squash/squash-fruit-falling-off-the-plant.htm
https://www.gardeningknowhow.com/edible/vegetables/squash/signs-and-treatments-of-squash-wilt.htm