The control of gray mold has always been the focus of fruit and vegetable disease prevention and control. The occurrence of gray mold is the most serious in the flowering and fruiting period of fruits and vegetables. So how do you prevent it after winter gray mold? What is more obvious about the prevention and control of gray mold? Learn with the pesticide network Xiaobian:
Mono Calcium Phosphate ,the chemical formula is Ca (H2PO4)2.H2O, molecular weight of the body is 252.06, after dryed the product is white or slightly yellow micro powder or granules, the relative density of 2.22 (16 °C). Slightly hygroscopic, soluble in hydrochloric acid, nitric acid, slightly soluble in cold water, almost insoluble in ethanol. At 30 °C, 100 ml of water soluble MCP 1.8g. The aqueous solution was acidic, heating the aqueous solution can get calcium hydrogen phosphate. Lose crystal water at 109 °C and decomposed into calcium metaphosphate at 203°C. Applications:Monocalcium Phosphate is used to supply mineral nutrition such as phosphorus (P) and calcium (Ca) for animal, which can be easily digested and absorbed. Extensively applied as additives of Phosphorous and Calcium in aquatic animals feed.Higher water solubility of MCP is required in aquatic animals feed.
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Generally speaking, the most prone to gray mold is in the case of low temperature, high humidity, and insufficient light. Therefore, in winter, fruit and vegetable cultivation needs to avoid the above situations as much as possible. To ensure the appropriate temperature and humidity, and to enhance the light of fruits and vegetables, Minimize the appearance of gray mold.
Gray mold is usually found on flowers, fruits, leaves and stems of fruits and vegetables. So do a good job in the prevention and control of gray mold:
First, do a good job of humidity and humidity regulation, which is the key to the occurrence of gray mold, good humidity control and wind and dehumidification can significantly reduce the incidence of gray mold.
Second, gray mold is the most susceptible to infection in the flowers and fruits of fruits and vegetables, and it is also the peak period of gray mold in flowering and fruit setting. Therefore, it is very important to do a good job in the prevention and control of the two phases. We need to spray the flowers and fruit parts to prevent gray mold by using appropriate chemicals and artificial pollination during the flowering and fruit setting periods of fruits and vegetables. The most commonly used pesticides are acetaminophen 400 g / liter suspension 1500 times. Liquid, 65% methicillin WP 600 times solution, 65% methyl sulfide, carbendazim WP 1000-1500 times solution, 50% chlorpyrifos water dispersion granule 3000 times solution.
Third, through comprehensive prevention and control measures to effectively prevent gray mold. In the pastoral of fruits and vegetables, it is necessary to fully remove the diseased leaves, diseased flowers, and diseased fruits. In the process of removal, the diseased tissue is gently removed and placed in a plastic bag, so as to avoid the spread of gray mold spores, and then Let the sick body stay away from the vegetable field and bury it in time, and do not throw it at will; for the residual petal that is easy to infect gray mold, we can use the bumblebee pollination technology, the petals will naturally fall off after bumblebee pollination, which can effectively reduce The route of transmission of gray mold; when the plant is dense, the pesticide manufacturer recommends that the smoke agent, such as Pythium and chlorothalonil, be used as a smoke control measure. Pay attention to the environmental protection work when using pesticide control. Use medication at intervals while ensuring picking after a safe interval.
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