complicated question because I am trying to explain this to a woman from Nepal who doesn't speak much English! Her pumpkins, squash etc. have yellow leaves and are dying on the vine. I believe it is squash bug. Should she rip everything down? Still time to replant cucumbers now but wonder about pumpkins? Also best insecticide to use on young plants?
Both squash bugs and squash vine borers can quickly cause cucurbit vines to wilt and die.
It is too late in the season for any cucurbits except summer squash. They can be planted until about August 1st.
Squash vine borer can only be controlled when the plants are young by applying an appropriate insecticide on the young plant to prevent the young borer from infesting the developing vines. Many insecticides are labeled for these insects including sevin.
Squash bug and squash vine borer:
If the squash bug has infected the plants with yellow vine decline, they should be removed. This is a disease that infects the plant. More information on the squash bug and the disease it carries is here:
Please read and follow all label instructions before applying any pesticides.
Feel free to contact our office if you have other questions.
Let me know if I can help you further!
Jefferson County Cooperative Extension Service
810 Barret Ave
Louisville KY 40204