Recently, some newspapers published the "small-scale recipe for preventing and treating cucumber diseases with brown sugar fermentation broth," causing concern among vegetable farmers. The spraying of brown sugar fermentation liquid mentioned in the small prescription can prevent and cure cucumber bacterial spot disease, gray mold and downy mildew, and can increase the yield of cucumber, as well as the production method of brown sugar fermentation. Many letters and inquiries were made. With regard to the scientific and practical problems of this small prescription that farmers' friends are concerned about, the reporter of this newspaper made a special visit to a vegetable expert and answered questions for the peasant friends.
Professor Zhang Enhui, a vegetable expert at the Northwestern A&F University’s College of Horticulture, told reporters whether the brown sugar fermentation broth has the effect of preventing cucumber diseases and must be verified by scientific experiments. Farmers' friends can also choose to plant a small amount of bacterial spotted plants in their own cucumber or solar greenhouse cucumber sheds and spray brown sugar fermentation broth. It is best to apply other drugs to prevent bacterial spotting of cucumbers on other diseased plants. Compare its control effect. Can not blindly promote brown sugar fermentation broth to prevent disease, to prevent delays in the disease, resulting in unnecessary economic losses. For a new agent, its use method, dose or concentration, and control effect all need to go through repeated trials and come to a clear conclusion before it can be widely used.
Professor Li Xin of the College of Plant Protection, Northwest Agriculture and Forestry University pointed out that brown sugar fermentation broth cannot have the ability to directly sterilize and prevent diseases of cucumber. Spraying brown sugar fermentation broth may inhibit the disease from continuing to occur, and may also cause certain nutritive substances in the fermentation broth to be used. After the crops have been absorbed, they have increased their resistance to diseases. As for the results and the degree of inhibition, it is necessary to go through experiments. In addition, there is no scientific basis and strict experimental data for the propaganda that this kind of fermentation liquid can prevent cucumber diseases. It may cause harm to the plants when used. For example, high concentration may cause “burnâ€.
Here, experts recommend that a large number of vegetable farmers, the use of brown sugar fermentation broth to prevent cucumber diseases need to be cautious.
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