Hello all, I am attaching pictures of my grapevine. I am concerned with these dark spots i noticed on the vine and I even saw Salome on on one set of grapes growing! What is this? Can it be helped?
Grapevines have spots!
- Thread starter NativeOddity
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The following link might be of help.
Early Season Phomopsis and Anthracnose Management in Virginia Vineyards - American Vineyard Magazine
Phomopsis symptoms: One of the diseases you need to consider soon after bud break is Phomopsis cane and leaf spot. It causes minor leaf spots, which are more evident to …
americanvineyardmagazine.com
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NativeOddity
Maybe the plant needs more water..but not sure what it is...
Wow! This looks like the exact issues I see. Oh boy!The following link might be of help.
Early Season Phomopsis and Anthracnose Management in Virginia Vineyards - American Vineyard Magazine
Phomopsis symptoms: One of the diseases you need to consider soon after bud break is Phomopsis cane and leaf spot. It causes minor leaf spots, which are more evident to …
Would it be exaggerated to just restart the process with new grape vines?
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I haven't grown grapes in many years as Texas has so many negatives on grape horticulture that I decided to spend my time on vegetables. Having said this and regarding starting over with new vines, the answer is I just don't know. The spores of both phomopsis and anthracnose both live in soil. I don't know how long the spores are viable in the soil. If you killed the plant and removed the vine completely there would still be spores and killing these spores will take quite a bit of time. You can incorporate sulfur into the soil and this will kill the spores but using to much sulfur will cause toxicity. What most folks try is a lime-sulfur mix but it still takes up to about 2 years to be reliably effective. Basically this disease is caused by temperature and rain and it takes about 3-5 years for it to become noticeable. It is a crap shoot about replacing vines but if you do decide to replace them plant a resistant variety. What this variety is I don't know and you will have to find out from your extension agent.