how can I tell the difference in grapevine leaf problems between water problems, disease. - Ask Extension
Having grapevine leaves dry out, turn yellow, have bumps, both in red and green. I've checked for mildew and did not see any symptoms. Grapes are cont...
Knowledgebase
how can I tell the difference in grapevine leaf problems between water problems, disease. #875669
Asked July 02, 2024, 1:28 PM EDT
Having grapevine leaves dry out, turn yellow, have bumps, both in red and green. I've checked for mildew and did not see any symptoms. Grapes are continuing to grow, vines are growing in length, leaves are enlarging.. I've checked where vines join the stems and did not see any signs of insect or discolored parts of the vines.
What should I do? Can I fertilize the vines? IF so with what minerals?
from North Portland
Multnomah County Oregon
Expert Response
Thank you for your question, Robert. There are at least 26 diseases known to impact grape plants, and many of them are issues caused by underground activities. https://pnwhandbooks.org/plantdisease/host-and-disease-descriptions?title=grape
We can't diagnose the problem(s) without photos, and figuring it out might require lab testing of both the plant and the soil. I suggest that you send plant and soil samples to the OSU Plant Clinic for examination: https://bpp.oregonstate.edu/how-submit-plant-materials
I hope they can help. Good luck!
We can't diagnose the problem(s) without photos, and figuring it out might require lab testing of both the plant and the soil. I suggest that you send plant and soil samples to the OSU Plant Clinic for examination: https://bpp.oregonstate.edu/how-submit-plant-materials
I hope they can help. Good luck!
