Effective use of summer herbicide acetochlor

In recent years, due to the changes in planting structure, the dryland crops in China have rapidly expanded, and the use of herbicide acetochlor in dryland crops such as corn, peanuts, tomatoes, and green beans has also rapidly increased. Some farmers in the course of their use have caused poor weed control due to improper use methods, and even caused continuous harm. For this reason, when using acetochlor herbicide in drylands, the following four points should be noted:

One is the quality of soil preparation. The quality of soil preparation is directly related to the efficacy of acetochlor. The quality of site preparation is not good, and the old grass is not eradicated, which will directly affect the weeding effect, because acetochlor can only be absorbed by young shoots and young roots of weeds, and there is no control effect on already-formed weeds. The quality of site preparation is not good, the soil is uneven, and it is impossible to spray the liquid evenly, which will affect the weeding effect.

Second, medication time. Acetochlor is a selective pre-emergence herbicide. It can only be used before the weeds are unearthed after the crop is sown to produce its medicinal effect, and the earlier it is used, the better, and basically no effect on the unearthed weeds. .

Three soil moisture. The effect of acetochlor on weeds is mainly through the absorption of young shoots and young roots of weeds, inhibiting the growth of young shoots and young roots, stimulating the roots to produce a necrotic deformity, and leading to the death of weeds. A certain amount of soil moisture will help improve the grass-killing effect. If persistent dry weather is encountered during the medication phase, weeding effects will be greatly reduced. Therefore, watering the soil to increase soil moisture and then using drugs is one of the key measures to improve the efficacy of acetochlor.

Fourth, injury problems. Acetochlor herbicides are prohibited on cucumber, rice, spinach, wheat, leeks, sorghum and other sensitive crops. The use of acetochlor herbicide in tomato, corn, soybeans, vegetables, rapeseed and other crops should be limited to 50 to 75 milliliters per acre, otherwise it is easy to produce phytotoxicity.

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