DOWNY MILDEW ON CUCUMBER, CUCURBITACEAE: Spraying begins when plants begin to branch or when the first symptom of downy mildew appears and continues at 7-10 day intervals, depending on the severity of the disease. It should be sprayed so that all parts of the plant are covered, especially under the leaves. GRAPEVINE DOWNY MILDEW: The first application should be made when the shoots have reached 25-30 cm. The second and subsequent sprayings are carried out at 10-15 day intervals, taking into account the duration of the first spraying, the development of the disease and the meteorological conditions. POTATO DOWNY MILDEW: Spraying begins when climatic conditions such as high humidity occur for the emergence of the disease or when the first symptoms of the disease appear in the environment and continues at 10-12 day intervals, depending on the severity of the disease. ONION DOWNY MILDEW: Even if it is necessary to start the control when the daily average temperature reaches 160C and the proportional humidity reaches 80%, spraying may begin when the first signs of disease are seen around. TOMATO DOWNY MILDEW: Spraying begins when a white ash-like coating is visible under the 3-5 mm diameter brown spots on tomato leaves, or when the disease occurs every year when suitable conditions for the disease are seen. Spraying continues at 10-12 day intervals depending on the course of the disease and climatic conditions.