Recently, many fruit growers have reported that the phenomenon of flesh subsidence and browning of the color of the red grape cultivar that has been planted has not been effective for many applications. For this reason, consulting plant protection experts are generally considered to be symptomatic symptoms of grape downy mildew. The main causes are as follows: Since June, more rain has been recorded in more places, which is rarely seen in previous years. In June, it is a young fruit period, young and tender, and susceptible to downy mildew. At the beginning of July, symptoms concentrated and caused diseases to the farmers. The sudden illusion is actually the disease development process after the germ infection in late June.
In response, industry experts propose the following prevention and control programs. The majority of farmers can refer to the implementation of prevention and control:
1. Ears should be treated promptly in order to deal with the ear in a timely manner, must use high-performance downy mildew prevention and treatment agents such as 25% fluoxacoxazole (Paltech) + 72% preperoxide hydrochloride (concealed cream), 68.8% fluorine bacteria Promecon (Agfa) +40% Dimethomorph Suspension.
2. Timely and effective control of leaf downy mildew, comprehensively reducing the number of bacterial sources in the garden, can use dual treatment (two different mechanisms of action of fungicides used) control methods, such as 25% fluoxacoxazole (Beta ), 72% of promemid hydrochloride (concealed cream), 68.8% of fluorophyrin, promecarb (silver Faly), 40% of dimethomorph suspension, 50% of iprodione (promethine), 25 % Flumorph (Jin Fuling), 60% Manganese Fluoride (Duplex), 66.8% Mildock, etc.
3. In the process of disease development, the pesticide should be controlled in time to control the development of the disease. When the disease is completely controlled, the diseased grain should be removed in time and the fruit should be bagged.
4. At the same time as the prevention of downy mildew, other diseases in the vineyard, such as white rot, anthrax, gray mold, and brown spot, should not be neglected.
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