Acetochlor is a widely used herbicide. Commonly used in corn, cotton, beans, peanuts, potatoes, rape, garlic, tobacco, sunflower, castor, green onions, strawberries and other broad-leaved plants to control annual gramineous weeds and some small-grained broad-leaved weeds.
Rice, wheat, millet, sorghum, cucumber, watermelon, melon, spinach and leek are sensitive to acetochlor.
1. acetochlor cannot be used in rice seedling field and direct seeding field. Acetochlor has many drug names, so users should read it clearly. Also known as Hernes, Xiaocaoan, etc. It is an amide selective pre-bud herbicide, which can be absorbed by plant buds to stop the growth of buds and roots. Therefore, rice seedlings cannot be used for direct seeding. Gramineae weeds mainly absorb chemicals through bud sheaths. After being destroyed by chemicals, new leaves curl and shrink, other leaves shrink and the whole plant dies. Pesticides should be applied before weeds are unearthed, and the soil should be sealed. Because the residual effect of acetochlor in soil is long, there is still some risk after misuse of acetochlor, so it is best to change fields to raise seedlings. Paddy fields destroyed by acetochlor cannot be planted directly. Bean crops can be sown after ploughing, and rice can also be planted after ploughing if the dosage is not very large.
Two, transplanting field, throwing field to master the medication period, control the dosage. Rice seedlings are sensitive to acetochlor, and more than 5 leaves have certain resistance. The mixture of acetochlor and bensulfuron-methyl can be applied after live transplanting of rice, but it needs to be mixed with toxic soil and cannot be sprayed. Field water cannot flood the seedling heart, otherwise it will cause phytotoxicity to rice plants. Acetochlor has high activity in paddy field environment, so the dosage should be strictly controlled. When used in rice transplanting field, the dosage of acetochlor should not exceed 7.5 grams per mu in the field and 2 grams in the field. If the dosage is too large, it will strongly inhibit the growth of rice seedlings after application.