Howdy, Mary...nice to see ya!
When I use a pump-up sprayer I use about a "glug" of alcohol.
If I were to use a hand-size quart spray bottle I'd use no more than a tablespoon of alcohol. I hope you get those boogers, especially on the winter squash so you get a good harvest for winter use.
Hope all is well out your way!
Best to you and yours!
Friend Shoe