Q.I Have A Brown Disease On My Grape Leaves
These spot and places on the leaves only showed up about a week ago. The plants are only 1.5 years old. Can you tell me what it is and how to treat it?
Certified GKH Gardening Expert
They were likely overwatered at transplant, or still in saturated soils.
This will need to be dosed with a fungicide/bactericide. These articles will help:
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/special/organic/biofungicide-information.htm
https://www.gardeningknowhow.com/garden-how-to/info/homemade-fungicide.htm
https://www.gardeningknowhow.com/garden-how-to/info/applying-bactericide-to-plants.htm
Make sure that the soil dries, thoroughly, down to about 3 or 4 inches between watering. This can help prevent future infections once you get the current one under control. This article will help you to grow grapes, successfully:
https://www.gardeningknowhow.com/edible/fruits/grapes/growing-grapevines.htm