Hello Dennis,

Thanks for reaching out to the UNH Extension Infoline.

Have you seen any signs of insect damage, especially in the plant stalks? The squash vine borer is a common insect pest for cucurbits and causes wilting of the plants. If they are present, you will usually find yellow frass (insect poop) near the base of the main stem and possibly holes in the stem where they burrow. The insects live inside the stem and feed on the plant material until they mature enough to pupate into moths.

The best way to deal with these insects is prevention by using row cover over the plants as soon as they emerge, up until flowering to ensure pollination. 

Here is more information on this and other common squash problems-

https://extension.umd.edu/resource/key-common-problems-squash/

I hope this is helpful and please ask if you have further questions!



Hello Dennis,

I apologize for any confusion. In your original question, you didn't mention how many plants you have or how you grow squash in your garden. Many people grow squash in rows which allow for hoops and row cover. Others grow in raised beds which also facilitates the use of hoops and row cover.

Have you found any evidence of vine borers or other insects? The striped cucumber beetle transmits bacterial wilt which could also be causing your issues. Row cover is a good control method for excluding that insect as well.

Check out this other resource on vine borers for more information-

https://extension.unh.edu/resource/managing-squash-vine-borer-problems-new-hampshire-fact-sheet