Occurrence and Control of Cucumber Target Spot Disease
Target spot disease mainly damages the leaves of cucumbers and spreads to petiole and vines when severe. The front and back of the blade can be damaged. The diseased leaves begin as yellow water-soaked spots. As the lesions continue to expand, the lesions on the front of the leaves are slightly depressed, the lesions are nearly round or irregular, and the lesions are peripherally brown. The middle is light yellow. Mid-morbid lesions are easily perforated, and the lesions on the front of the leaves are rough and uneven. The lesions turn brown as a whole. The central part is grayish and translucent, and the center of the lesion often has an obvious eye-like bull's-eye. When the humidity is high, the lesion is often accompanied by a ring-shaped black moldy material, and when severe, the leaves dry and die. Control methods: 1. Strengthen management, timely ventilation and dehumidification, not flood irrigation, in order to reduce the indoor humidity. 2. Remove diseased bodies in time, and timely bring the diseased leaves and diseased fruits out of the field. 3. Pay attention to alternate medications to avoid drug resistance. The optional agents include 40% Fortune's EC 8,000 times, 40% Myclobutanil 3000 times, etc., sprayed every 7-10 days, and sprayed 2-3 times. Can also be appropriate to add foliar fertilizer is better, the focus is to spray the middle and lower leaves. Jet Hydrant,Automatic Hydrant Water Cannon,Jet Fire Extinguishing System,Jet Hydrant Water Cannon LIAONING YINGKOU TIANCHENG FIRE PROTECTION EQUIPMENT CO.,LTD , https://www.tcfiretech.com