In recent years, due to changes in planting structure, the area of ​​dryland crops in China has expanded rapidly, and the use of dry herbicide acetochlor in corn, peanut, tomato, green beans and other crops is becoming more and more common. Some farmers have caused poor herbicidal effects due to improper methods during use, and even caused phytotoxicity. When weeding with acetochlor herbicides in dry land, the following four points should be noted:

Land preparation quality. The quality of the land preparation is directly related to the efficacy of acetochlor. The quality of the soil preparation is not good, the old grass is not cleaned up, which directly affects the weeding effect. Because acetochlor can only be absorbed by weed shoots and young roots, it has no control effect on the formed weeds; the soil is uneven, and the liquid can not be evenly distributed. Spraying affects the herbicidal effect.

Medication time. Acetochlor is a selective pre-emergence herbicide. Only when the weeds are used before the crops are planted, can the effects be achieved, and the earlier the better, the better the weeds are. effect.

Soil moisture. The effect of acetochlor on weeds is mainly through the absorption of weed buds and radicles, inhibiting the growth of young shoots and radicles, stimulating roots to produce tumor-like deformities, resulting in weed death. A certain soil moisture is conducive to improving the herbicidal effect. If there is continuous dry weather during the medication phase, the herbicidal effect will be greatly reduced. Therefore, first watering to increase soil moisture and then use it is one of the key measures to improve the efficacy of acetochlor.

The problem of phytotoxicity. Acetochlor herbicide is forbidden to be used on sensitive crops such as cucumber, rice, spinach, wheat, leek, sorghum, etc. The use of per acre in tomatoes, corn, soybeans, vegetables, rapeseed and other crops should be limited to 50-75 ml, otherwise It is easy to produce phytotoxicity.

More pesticide knowledge , please pay attention to China Pesticide Network

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