Due to the continuous encounter with cloudy days and hazy days, the diseases in the greenhouses have returned. In low temperature and high humidity vegetable sheds in winter, low temperature makes the growth of vegetables slow, yield is low, and high humidity is more likely to cause disease epidemic.
Vegetables in winter greenhouses are the most susceptible to gray mold disease. The main reason is that Botrytis cinerea is highly adaptable and can survive at low temperatures (it can also develop at around 10°C). Coupled with the high humidity inside the greenhouse, the occurrence of diseases is even more serious. How to effectively prevent gray mold? Song Yuanlin, a researcher at the Vegetable Research Institute of the Shandong Academy of Agricultural Sciences, introduced two tips for using herbs to farmers.
“Botrytis cinerea usually invades the wounds of vegetables first, so most of the diseases first occur from the top of the plants (falling flowers), and then the whole plant develops step by step.†Song Yuanlin introduced, the first kind of medication tips is, greenhouse vegetables in artificial The main points of the pollination of farmers are applying carbendazim at a concentration of 300:1, so that the vegetable farmers can use the vegetables to pollinate the plants while they are artificially pollinated, which saves time and plays a role in disease prevention and control.
The second method for controlling gray mold is mainly aimed at the problem of gray mold appearing when picking vegetables and fruits. “When crops are harvested, they will leave wounds. Farmers can spray carbendazim once after the crop has been picked.†Song Yuanlin explained that this method of medication requires attention and can only be applied on a sunny basis because it is sprayed during rainy weather. It is easy to increase the humidity inside the shelter so that it will not achieve the desired disease prevention effect. He recommended rainy days for smoking or dusting on the rainy days so that the uniform use of the drug can be achieved without increasing the humidity in the greenhouse. This avoids incomplete leakage of the spray.
Medication time is also stress. Spraying in winter is usually done in the sunny morning after the leaves dry after the medication or afternoon medication, but to avoid the medication at noon high temperature. Flue-cured tobacco is generally chosen to be used in the evening, but different time should be selected according to crops and pesticides. For example, if the beans and vegetables are smoked and sterilized, they should be smoked after 12 o'clock in the evening to prevent the smoking time from being too long. Crop growth. Spraying powder can be used in the sunny morning or in rainy weather, and the condensation of leaves is better.
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