Thompson seedless - Knowledgebase Question

Name: Don Robinson Jr
El Cajon, Ca
Question by drobinson403
July 28, 2010
my tompson seedless grapes get plenty of water but this season they looked very healthy at the begining with grapes, then at one point leaves starying turning brown and the grapes started to shrivel up and it traveled through out the plant. what kind of fertilizer do they require if any. Any ideas ? Don Robinson. My Email address is [email protected]


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Answer from NGA
July 28, 2010

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Most of the problems with grapes are from fungal diseases or crown rot. You'll need to carefully inspect your plant, especially near the soil level for signs of cankers, odd growths, or mushy plant parts. You might even cut into a woody portion of a vine to see if there are streaks of dark colored wood. If so, you're dealing with a disease that's affected the entire plant. If not, the problem might be related to water stress. Since it's almost impossible to diagnose a plant problem without actually seeing it, you may want to take samples to your cooperative extension office for help with diagnosis. The closest office is in San Diego: University of California Cooperative Extension, 9225 Clairemont Mesa Blvd, San Diego, CA 92123-1211 phone (858) 694-2845. I'm sure they can help pinpoint the problem for you.

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