With the increase in the proportion of herbicides applied, the herbicides in corn fields in our province have become very common in recent years. The herbicide harm is light, which affects the normal growth of corn, and severely reduces the yield.
There are three types of corn herbicides: 1) herbicide residues caused by corn chlorsulfuron-methyl, imidazolium, metsulfuron-methyl, and chlorsulfuron-methyl; 2 chemical herbicides used in the past Sustained low temperature, rainy, improper medication or excessive drug dosage is easy to produce phytotoxicity; 3 herbicides for controlling weeds in grasses and cash crops after seedlings, close to corn fields, easy to spray when spraying Corn causes drifting phytotoxicity.
Prevention and mitigation measures: Pay attention to prevent the residual phytotoxicity of the herbicides before and after; carefully select the correct use of 2,4-D, oxazinone, and nicosulfuron to prevent the herbicide damage in the year. Once the phytotoxicity occurs in the corn, the phytotoxicity mitigating agent or the plant growth regulator (the brassinolide) and the foliar fertilizer may be sprayed at the initial stage of the phytotoxicity to relieve the phytotoxicity, so that the damaged plant can resume growth as soon as possible. It is recommended to use 0.01% Tianfengsu 150ml or 0.1% Shuofeng 481 soluble powder 120g or 0.003% Ai Zengmei 75ml mixed high-quality quick-acting foliar fertilizer per hectare to spray at the beginning of the symptoms. Brassinolide can effectively regulate the physiological and biochemical functions of the damaged plants, promote the normal growth of the damaged plants as soon as possible, and the high-quality foliar fertilizer can supplement the damaged plants.
There are three types of corn herbicides: 1) herbicide residues caused by corn chlorsulfuron-methyl, imidazolium, metsulfuron-methyl, and chlorsulfuron-methyl; 2 chemical herbicides used in the past Sustained low temperature, rainy, improper medication or excessive drug dosage is easy to produce phytotoxicity; 3 herbicides for controlling weeds in grasses and cash crops after seedlings, close to corn fields, easy to spray when spraying Corn causes drifting phytotoxicity.
Prevention and mitigation measures: Pay attention to prevent the residual phytotoxicity of the herbicides before and after; carefully select the correct use of 2,4-D, oxazinone, and nicosulfuron to prevent the herbicide damage in the year. Once the phytotoxicity occurs in the corn, the phytotoxicity mitigating agent or the plant growth regulator (the brassinolide) and the foliar fertilizer may be sprayed at the initial stage of the phytotoxicity to relieve the phytotoxicity, so that the damaged plant can resume growth as soon as possible. It is recommended to use 0.01% Tianfengsu 150ml or 0.1% Shuofeng 481 soluble powder 120g or 0.003% Ai Zengmei 75ml mixed high-quality quick-acting foliar fertilizer per hectare to spray at the beginning of the symptoms. Brassinolide can effectively regulate the physiological and biochemical functions of the damaged plants, promote the normal growth of the damaged plants as soon as possible, and the high-quality foliar fertilizer can supplement the damaged plants.
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