When manual weeding is costly, it is difficult to control the damage of a large number of weeds. Chemical weeding techniques are quick and effective. Chemical weed control techniques for the main vegetable fields in summer and autumn are as follows: 1. Cabbage is treated with 60% butachlor 100 ml/mu before the planting of cabbage seedlings. It has a good control effect against weeds and is basically safe for Chinese cabbage. And reduce the mechanical loss caused by manual weeding. Due to the rapid emergence of Chinese cabbage, it should be applied immediately after sowing. 2. The selectivity of radish and radish to herbicides is not high, and it is safe to use 60% butachlor 120 ml/mu or 53% AM-2 150 ml/mu (developed by the Municipal Agricultural Research Institute of Plantation) as its emergence. And growth has no effect. 3. Before transplanting or after transplanting, tomato should be sprayed with 48% of tetracycline 200 ml/mu, 33% of herbicidal 150 ml/mu or 53% AM-2 150 ml/mu, especially AM- 2 For single and dicotyledonous weeds, they have good control effect, and they are safe to tomato. Please pay attention when spraying, and try not to touch or reduce contact with the crop. 4. Cucumber live cucumber, before sowing seedlings, use 48% of tetracycline 200 ml/mu for soil treatment. Transplanting cucumbers. After transplanting and rejuvenating the seedlings, the soil surface was sprayed with 33% weeding and 150 ml/mu. Combined with cultivator and soil mixture, the herbicidal effect was good and the cucumbers were safe. 5. Before celery celery is transplanted or after transplanting, seedlings are treated with 48% trifluralin sprayed at 100-150 ml/mu, combined with cultivator and mixed soil to make celery safe. Weeding in vegetable fields, as long as we have a good grasp of the time, dosage and method of medication, we can achieve a good weeding effect and obtain good benefits.
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