Post-emergence weeding technology editor corn Hello: My family has grown many weeds in this year's cornfield. There are many types of weeds. I would like to ask editors to find experts to give some tips to remove these weeds. Huamin Village, Huamin Township, Longjiang County Zhang Jiancai Zhang Jiancai Hello: After receiving your call, we consulted Li Qingxiao, a researcher at the Provincial Plant Protection Station. He believes that: low temperatures this spring, 7-10 days after sowing corn, it is best to choose manual weeding, so that three shovels and three rakes, which will help increase ground temperature and promote seedling growth. Chemical weeding is only a helpless choice for manpower shortage, hope you handle it as appropriate. At the same time, we also invited Li Qingxiao researchers to write a method for chemical weeding for your reference. At present, the planting of Datian in the province has ended, and maize has generally emerged. Most of them are in the 2-3 leaf stage. Due to the abundant rainfall this spring, the field grass seedlings grow in length, both grassy weeds and broad-leaved weeds. If you intend to carry out chemical weed control, herbicides that prevent the above two types of weeds should be selected. The following two kinds: 1. 4% jade farm fungicide suspension, in the 3-5 leaf stage of corn seedlings, 1-year weeds 2-4 leaf stage, broadleaf weeds before the 6 leaf stage, 100 ml per mu. Spray 30-40 liters of water. When spraying, the spray head should be low and spray the liquid evenly on the weed stems and leaves. The agents that fall on the surface of the soil also have a certain herbicidal effect. The active ingredient of the herbicide is nicosulfuron, which has phytotoxicity to the crops of the after crop. The mandible can be planted with corn, soybeans, wheat, etc. It takes 18 months to plant other crops. Second, 90% of the race class dry suspension agent, also known as Petters, Cypermethrin. Application of pesticides before the 4th leaf stage after corn emergence, 120-150 ml per mu, spray 30-40 liters of water. The drug has a half-life of 14-16 days in moist soil, but it has no closed weed control effect. It is safe for post-cultivation crops. It should be selected sooner or later when spraying. The temperature is low and the wind is small. Do not apply pesticides from 9:00 am to 3:00 pm. . Prolonged drought. Do not apply pesticide when the air humidity is below 65%. Do not apply pesticides when rain falls within 4 hours of weather forecast. (Heilongjiang Plant Protection Station Researcher Li Qingxiao)
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