Summer corn chemical weeding should pay attention to what?

What should summer corn chemical weeding pay attention to? Please give guidance on chemical weeding of summer corn. You can refer to the following methods: apply medicine to the grass. The selection of herbicides should be determined according to the types of weeds and the time of use. 40% atrazine or 41% yucaojing 150 ml 200 ml or 50% du A mixture 150 ml can be used in corn fields dominated by Tripterygium paniculatum, Saxifraga, Chenopodium, amaranth and Polygonum. It can be used before the seedling of corn after sowing, not later than the 2-leaf stage of weeds. You can also choose 4% Yunongle 60ml, which can be used in the weed stage with 3 leaves and 5 leaves. Strictly control the dosage. At present, there are many kinds of herbicides in corn field, the contents of active components are different, and the dosage is also different. In the use, we must strictly control the dosage, do not use too much or too small, not only to ensure the effect of weeding, but also can not affect the growth of corn and the next crop. The dosage of pesticide should be increased in the field of high wheat stubble. For mechanically harvested wheat fields, wheat straw and wheat bran should be removed first, and then grass-lowering agents should be used and the dosage should be increased appropriately. Generally, the recommended minimum dosage can be used in flat wheat stubble field, and the recommended maximum dosage can be used in high wheat stubble field. However, the dosage should not be increased at will, so as not to affect the growth of corn and the next crop. In case of drought, water first and then use medicine. In dry years, it should be watered first and then sprayed, and the ground should be moist when spraying to facilitate the formation of drug film on the ground. Take medicine at the right time. The time of using herbicides should be reasonably determined according to the appropriate period of use of herbicides to prevent the efficacy of herbicides from being affected by spraying too late. For corn fields with large grasses, 20% paraquat is sprayed on the ground to kill weeds immediately after corn sowing, and then special corn herbicides are sprayed. Increase the amount of liquid medicine. It is generally required that the amount of solution per mu should be 30kg to 40kg, and 40kg to 50kg for cornfields with high wheat stubble and in years of dry climate, and the ground should be moist after spraying. Apply the medicine correctly. First of all, the herbicide should be mixed into the mother liquid, the suspension should be shaken well and then used, the spraying should be reversed and sprayed, and the spraying time should be controlled in the windless weather before 9: 00 in the morning and 5: 00 in the afternoon. To achieve uniform spray, no re-spray, no leakage spray. Click to get more herbicide application techniques click to get more pesticide application techniques click to get more corn planting techniques