I don’t usually grow squash or zukes because of those bugs. However, the one year I did grow them. I used my homemade bug spray and was able to at least grow several very nice ones in 3 gallon pots.
The homemade spray used garlic, onion, cayenne pepper, a drop of dishwashing liquid and a drop of oil. The first time I made this spray, I was dubious, but I happened to see a water bug and squirted him.
He was belly up and dead within 30 seconds.
What are the amounts of the ingredients?