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Glen Allen, VA

Let me know what you think this might be. Yesterday, I mailed an affected leaf to the plant pathology lab at Virginia Tech to get a diagnosis. As soon as I get the results I will post them.

The symptoms first started on June 25th. I have been using Daconil and Eagle 20 fungicides every 14 days. I have also been using Heritage granular in the soil. None of these are stopping it. It is affecting the oldest leaves around the stump and moving from the oldest to newest leaves.

Here is a picture of the leaves the stump area:

http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=182870


Here is a newly infected leaf:

http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=182871


Here is the final result to the affected leaves. It only takes 1-2 days from initial symptoms to death.

http://www.bigpumpkins.com/Diary/DiaryViewOne.asp?eid=182872

7/4/2012 1:20:49 PM

South East

maybe matt d can chime in, but untill then. Check for leasions on you vines,,,than can ooze,,brownish, reddish sap. could be gummy stem but with so many diseases out there and simular symptoms its hard to say. What i would do is remove all affected leaves, especially the severe ones. If its a disease that spreads thru spores then its best to remove the leaves that are badly infected, it wil spread from them to other thru rain and wind.
Then once the lab tells you what disease,,get the fungicides and try to control it..good luck.

7/4/2012 2:02:56 PM

spider mites

7/4/2012 2:41:40 PM

Glen Allen, VA

Thanks for the feedback. I'm going to guess gummy stem blight. It looks just like those pictures Matt D has in his PowerPoint on leaf problems. I'll post the lab results when I get them.

7/4/2012 6:04:50 PM

Connecticut

Hi dpriceute-

Many possibilities with the information provided. Don suggested spider mite which is a possibility, and the advantage is you can see these. Take a piece of clean white paper to the undersides of the leaves and shake the leaves and inspect the paper. Spider mites are very small and you might want to look a picture of them online to know what you are looking for. If these are present then an insecticide will slow the spread.

As far as potential disease a systemic fungicide would be your best option seeing the spread habit. See what the lab finds, and see what they think it maybe or what they can rule out. The advantage of the lab is they have the ability to look for fungi. It does look like gummy stem as the leaves have holes in the leaves.

7/4/2012 6:26:23 PM

President - GPC

After you shake the leaveZ ontop of the paper.....try to smear the dots with the finger...rub them...if they smear and leave a trace....their spidermites.. they are way tiny
We have blood red oneZ here...my mom used to put baby power on the window sills as they would come in the house....true tiny cracks around the windowZ

7/13/2012 3:52:49 PM