As the weather warms up, with the germination and growth of crops, the use of pharmaceuticals will also increase, and various phytotoxicity phenomena are not uncommon. Some dominant phytotoxics are lighter, and crops can resume growth in a short period of time. For example, the phytotoxicity of oxyfluorfen in the garlic growing season is mostly burning dead white spots, as long as the growth point of garlic is not damaged, Conditioning can generally restore growth. However, if the 2,4-D butyl ester herbicide is misused on broad-leaved crops such as vegetables, cotton, and peanuts, the leaves are twisted into chicken claws to inhibit crop growth, which may result in severe yield reduction or production.
The black spots and dark spots appearing in the fruit of the bagged fruit tree before and after the maturity period, in most cases, the type or quality of the agent sprayed at the young fruit stage is inappropriate, causing the skin of the young fruit to be injured, providing an invasive passage for some parasitic bacteria, and finally Black or brown spots are formed on the fruit surface. The use of 2,4-D butyl ester in large doses after wheat jointing will cause wheat spike differentiation to be disturbed, and wheat ears often appear after twisting. The use of bensulfuron-methyl in large doses can also cause hidden phytotoxicity to the peanuts of the lower jaw, with symptoms such as slow growth of peanuts and short roots.
Many pesticides, especially herbicides, tend to have a significant sensitivity to a certain stage of growth of a certain crop or crop. For example, peach trees are sensitive to copper preparations, dichlorvos, trichlorfon, dimethoate, and chlorpyrifos. Peanuts are sensitive to sulfonylurea herbicides such as bensulfuron-methyl and metsulfuron-methyl, and wheat is sensitive to chlorpyrifos and atrazine. The class is sensitive to flusilazole, propiconazole and the like. Some inferior agents are also particularly susceptible to phytotoxicity in crops in sensitive periods. In order to save labor, some farmers sometimes pour the medicine that should be divided into three buckets of water into a bucket of water, which is easy to cause excessive pesticides in the crop to cause phytotoxicity.
There are three main ways to circumvent phytotoxicity. First, rational choice of pesticides, try not to choose the type of chemicals that are sensitive to crops; second, choose suitable weather conditions to use pesticides, avoid high temperature, drought, high humidity, low temperature, low light or high light when spraying pesticides; Require the dosage and operating procedures to use the drug, accurately calculate the dosage, dilute step by step, and clean the spray device as soon as possible after spraying the herbicide.
Plant Protection Institute of Chinese Academy of Agricultural Sciences Zhao Zhanzhou
Farmers Daily
The black spots and dark spots appearing in the fruit of the bagged fruit tree before and after the maturity period, in most cases, the type or quality of the agent sprayed at the young fruit stage is inappropriate, causing the skin of the young fruit to be injured, providing an invasive passage for some parasitic bacteria, and finally Black or brown spots are formed on the fruit surface. The use of 2,4-D butyl ester in large doses after wheat jointing will cause wheat spike differentiation to be disturbed, and wheat ears often appear after twisting. The use of bensulfuron-methyl in large doses can also cause hidden phytotoxicity to the peanuts of the lower jaw, with symptoms such as slow growth of peanuts and short roots.
Many pesticides, especially herbicides, tend to have a significant sensitivity to a certain stage of growth of a certain crop or crop. For example, peach trees are sensitive to copper preparations, dichlorvos, trichlorfon, dimethoate, and chlorpyrifos. Peanuts are sensitive to sulfonylurea herbicides such as bensulfuron-methyl and metsulfuron-methyl, and wheat is sensitive to chlorpyrifos and atrazine. The class is sensitive to flusilazole, propiconazole and the like. Some inferior agents are also particularly susceptible to phytotoxicity in crops in sensitive periods. In order to save labor, some farmers sometimes pour the medicine that should be divided into three buckets of water into a bucket of water, which is easy to cause excessive pesticides in the crop to cause phytotoxicity.
There are three main ways to circumvent phytotoxicity. First, rational choice of pesticides, try not to choose the type of chemicals that are sensitive to crops; second, choose suitable weather conditions to use pesticides, avoid high temperature, drought, high humidity, low temperature, low light or high light when spraying pesticides; Require the dosage and operating procedures to use the drug, accurately calculate the dosage, dilute step by step, and clean the spray device as soon as possible after spraying the herbicide.
Plant Protection Institute of Chinese Academy of Agricultural Sciences Zhao Zhanzhou
Farmers Daily
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