there's some white spots under all the leaves and some bubbleing on the top , what's the name of this disease and how do I cure it?





thank you in advance

George, go to this link , register and ask your question.  They are grape experts there.  I know diseases in the South West, but no clue about what you have.  Someone there will.

Suzi

I don't know what it is either, but I get the same thing on the suckers that grow up an old stump at the fence-line in my yard. I just keep cutting them every summer and it never shows up on anything else. I thought it was species specific, maybe the strain in my yard is, or maybe my grapes are far enough away or I don't let it progress to the stage where it can spread.

Hope you find a non-toxic solution.

Grape Erineum Mite, Colomerus vitis Pagenstecher (Acari: Eriophyidae)

    The grape erineum mite is very different in appearance from the two­spotted spider mite. It is tiny-about 1/250 inch long-worm-like and yel­low.  The erineum mite over­winters under the bark of 1-year-old grape canes and crawls out onto the leaves during the summer to feed and reproduce. Several generations occur every year.

The damage due to grape erineum mite is noticeable. On the upper leaf surface, a gall-like or blister-like erineum forms, and on the lower surface, a white, dense growth of abnormally curled plant hairs occurs. The mites feed and reproduce within the whitish plant growth on the under­surfaces of the foliage.

In situations where severe infestations become established, reduced vigor and impaired vine growth could result from feeding by the mites on the new leaves. The mites may be introduced into a vineyard on infested nursery stock.