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South Dakota

I am posting this for Stuart Sharples sharpiestackle@yahoo.com who I am trying to help. This is the question I got from him. His pic is posted in my diary. http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=326421

Leaves on 1st secondary on right side wilted a week ago. I cut that off the main. Went away on vacation for a week.
Came back to main vine now getting same issue with leaves wilting and rotting.

I dont see any SVB and actual vine looks and feels healthy

How can I stop this from getting further down main vine ?

7/26/2021 7:32:11 AM

Syracuse, NY

I have Googled

bacterial wilt in pumpkins

a good description of it was in :

https://www.growingproduce.com/crop-protection/disease-control/win-the-war-against-bacterial-wilt-of-cucurbits/

See about the cutting of a sample vine test for sticky sap between the halves of it -

I did not see an EXACT same picture of what is in your picture, but I'd always ASSume it's bacterial wilt, from feeding by cucumber beetles, which could be alleviated in other healthy plants by spraying all plants with Imidacloprid (or perhaps the one mentioned at the end of the article); I had ONE leaf with the same look on my 1985 Miller and cut it off at the base as soon as I saw it and tossed it well away from the plant. What's throwing me off is the unusual TAN color of the leaf in my and his cases---eric g

7/26/2021 12:57:20 PM

Western PA

That's what my plants did this year. Lost them all. I had lots of cucumber beetles early.

7/27/2021 4:15:48 PM

Bethlehem CT

Right, it's the cucumber beetles that can be vectors of bacterial wilt disease. Plants are especially vulnerable to picking up bacterial wilt in the early stages (4 to five leaf stage). The likelihood of transmitting the disease decreases as the plant starts to vine out.

7/27/2021 5:40:48 PM