Early spring is the best time to apply herbicides , but if the method of using herbicides is wrong, it is easy to affect the normal growth of the crops. What is the method of using herbicides? Let's take a look at the small series.
First, different herbicides should be selected according to soil characteristics, microbial species, climate and irrigation conditions. For example, the herbicide containing chlorsulfuron-methyl is mainly degraded by hydrolysis in the soil. When the field is alkaline soil, the rainfall is low in the year, and the soil is dry, the residual period in the soil is often prolonged. It is vulnerable; on the other hand, if the acid soil, the soil is wet or the farmland is filled, the residual period is shortened, and the crop is relatively safe.
2. Before planting in Daejeon, it should be known whether the herbicide applied in the former sputum has phytotoxicity to the sorghum crop. If the herbicides containing chlorsulfuron-methyl or metsulfuron-methyl components, such as wheat straw, wheat straw, etc., have been applied before, the corn, soybean, cotton and other crops cannot be planted.
Third, improve the application method and reduce the amount of soil residue. First, the dosage should be accurate, the spray should be uniform, no leakage, no heavy spray. Second, the period of use should be flexible. It can be treated before the crop is planted, before the seedlings, or after the seedlings. When applied after emergence, add auxiliaries or synergists to improve the efficacy and reduce the dosage. The third is to apply drugs rationally. Mixing chlorsulfuron with 2,4-D butyl ester can reduce the amount of chlorsulfuron by 50%. Pussite soil treatment can be mixed with trifluralin, acetochlor, alachlor, secazine and the like. The use of Pu Shite and Guangshiling for strip spray can reduce the dosage by more than 30%.
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