The grape diseases however do not occur all the time. Grapevine Powdery Mildew: Eastern Washington – WSU #EM058e; WESTERN WA – Grapevine Powdery Mildew: Western Washington – WSU #EM059e ESPAÑOL – Oídio de la Uva – WSU #EM058ES Botrytis Bunch Rot. Grape Powdery Mildew. Grape Diseases (Phomopsis Cane and Leaf Spot, Black Rot, Powdery Mildew, and Downy Mildew, is Absolutely Critical. A great amount of money is invested in the control of these grape diseases. Some treatments include: Radioactive iodine therapy. Foliar and Fruit Diseases. With this therapy, you take radioactive iodine (radioiodine) by mouth. All the training and pruning and years and years of waiting for the first batch of grapes can be a lot to bear for any grower. Botrytis Bunch Rot – WSU #FS046e; ESPAÑOL – Prodredumbre por Botrytis (.pdf) – WSU #FS046ES Phomopsis Cane and Leaf Spot There is black rot grape treatment, and, with some effort, you can defeat this merciless fungal disease. Fear not! As the vines get older, other disease start cropping up. When grape black rot ruins your harvest, you may want to throw in the towel. Downy Mildew (Plasmopara viticola) Downy mildew causes yellow spots on the leaf top surface and white fungal growth (sporulation) on the … Patients should be treated vines, that infectious diseases do not spread to other plants. The common grape diseases are downy, powdery mildew and Botrytis bunch rot. Effective treatment of diseases of grapes, Firstly, required quarantine, high ahrofon, and preventive treatment measures, aimed at preventing diseases vine. The treatment goals for Graves' disease are to stop the production of thyroid hormones and to block the effect of the hormones on the body. However, grapes like many other fruits get certain diseases. Growing grapes in the home garden is a labor of love.