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Post-emergence chemical corn weeding ten note
Corn field chemical weeding technology, labor saving, low investment, high efficiency. In recent years, the application area of ​​post-seedling corn herbicides in China's corn production areas has been expanding year by year. Due to the insufficiency of drug application techniques by some drug users, some fields have different levels of drug hazards. Therefore, here remind farmers to pay attention to the following: First, whether the soil is closed or treated with stems and leaves, there is a good rainfall effect when the soil is dry and water is poured or applied. Second, strictly in accordance with the instructions, can not arbitrarily increase or decrease the amount of medication, not heavy spray or missed spray, so as not to produce phytotoxicity or reduce the effectiveness of control. 3. Field application should be conducted after 4 pm in the absence of wind and rain, so as to avoid possible harm caused by wind and rain and abnormal high temperatures. Fourth, strictly control the application period: the soil closed treatment should be mastered before the seedlings after corn sowing; postemergence stem and leaf treatment should be in the corn 3 to 5 leaf stage (about 15 days after sowing) in order to avoid premature application (corn 3 leaves before the emergence of self-producing wheat seedlings, sedges and other unearthed, reducing efficacy. If corn exceeds 5 leaves, directional spray should be applied and the spraying method should be adopted. Do not spray the liquid onto the corn leaves. Do not use drugs after 7 leaves. 5. The chemical weeding technology in the corn field is only suitable for corn monocropping, and it is not suitable for the relay. 6. After the soil is closed, people and animals must not enter the ground within 1 week in order to avoid damaging the medicinal film and reducing the effectiveness of control. 7. Regardless of whether it is closed or stem and leaf treatment, rain should be re- sprayed 24 hours after application. VIII. Use of post-emergence herbicides such as Qingshui and Yulianchun cannot be combined with any pesticides. In particular, organophosphorus pesticides are strictly prohibited within 7 days before and after application. If it is necessary to control corn seedling pests, Tianlongbao and other non-organic phosphorus can be used. Pesticides. Nine, the use of herbicides to be double-dilution, that is, according to the application area to calculate the required dose, first add a small amount of water into the mother liquor, and then take the same amount of mother liquor into the sprayer to stir the water. 10. When using herbicides, sprayers must be carefully cleaned before and after application to avoid injury to crops or other crops.