Cucumber target spot disease, also known as "yellow-point disease," was originally a yellow water-soaked spot with a diameter of about 1 mm. Mid-onset lesions expanded to a round or irregular shape, easy to perforate, the frontal lesions are rough and uneven, lesions overall brown, central gray, translucent. The diameter of the lesion can reach 10-15 mm in the later stage. There is a clear eye-like bull's-eye in the center of the lesion. When the humidity is high, sparse gray-black moldy material can be formed on the lesion and it is in a ring shape. The difference between cucumber target spot and bacterial angular spot: lesions of target spot, leaves with similar color on both sides, mildew and black moldy when exposed to high humidity, and bacterial keratoses with white fungus formed on the back of leaves. The white marks are clearly visible and have no mildew on both sides. The difference between cucumber target spot and downy mildew disease: target spot lesions are dead, diseased and healthy junctions are obvious, and the lesions are rough; while the downy mildew leaves are chlorotic and yellow on the front, and the disease is not clear at the junction. The lesion is very flat. At present, the occurrence of cucumber target spot disease is serious, and the common pharmaceuticals are difficult to be effective. There are three main reasons: 1. Target spot disease is caused by mixed infection of fungi and bacteria. It is difficult to achieve good effects by preventing fungi or bacteria alone; 2. Target spot disease The current general fungal agents produce a strong resistance to drugs; 3. Streptomycin as the representative of the bacterial disease treatment agents are currently serious resistance, and the specific effects of bacterial diseases copper formulations are often not mixed, and unsafe. According to the author's test, the use of Kai Run 2000 times or Bai Tai 750 times + net fruit essence 750 times the formula treatment of cucumber target spot disease has a significant effect. Goggle,Breathable Safety Goggle,,Protective Disposable Goggle Dongguan Keyutai Mask Co., Ltd. , https://www.maskkytai.com
Cucumber target spot disease prevention formula