Chemical herbicides commonly used in corn fields
There are as many as 43 species of weeds in summer corn fields, including 12 species of monocotyledonous weeds and 31 species of dicotyledonous weeds. To control weeds in corn fields, farmers have to spend a lot of manpower and material resources. With the development of agricultural science and technology and the large-scale transfer of agricultural labor force, it is imperative to adopt a provincial, labor-saving and time-saving method of chemical weeding. Here are some herbicides commonly used in corn fields. 1. Atrazine, also known as Atrazine, is a 40% rubber suspension and is a broad-spectrum herbicide commonly used in corn fields. It is used before emergence after corn sowing, that is, atrazine is sprayed immediately after sowing of corn, and the dosage per acre is 200-300 ml. It should be noted that atrazine has a long duration in the soil, and if the amount of atrazine is too large, it can easily damage the sensitive crops (such as rapeseed). Therefore, weeds are commonly used to remove weeds. Maize 3 to 5 leaf stage, weed 2 to 3 leaf stage. 2. Acetochlor Acetochlor (50% EC) is the largest herbicide produced in China. It is used before emergence after corn sowing. The dosage per mu is 150-200 ml. The herbicide is safe for soybeans and peanuts and is therefore suitable for plots interwoven with corn, soybeans and peanuts. Acetochlor mainly controls annual grass weeds and has poor control effect against dicotyledonous weeds. 3. The butachlor dosage form was 50% and 60% EC, which was used before emergence after corn sowing. The dosage per acre was: 60% butachlor 125 to 150 ml or 50% butachlor 150 to 185 ml. Butachlor is safe for soybeans and peanuts, so it is suitable for plots of intercropping maize with soybeans and peanuts. 4. Ethyldithiocarbamate is a mixture of atrazine and acetochlor. It is used before emergence after corn sowing. The dosage per acre is 200-300 ml. It should be noted that B can not be used for land plots interwoven between maize and soybeans and peanuts. It can only be applied to plots of corn monoculture. 5. Kesileok Kelingling 45% suspoemulsion is a herbicide and compounding agent successfully developed by the Weed Research Lab of the Agriculture Department of Laiyang Agricultural College in Shandong Province. It is a new, safe, and efficient weed control system for controlling weed communities in corn fields. Agent. After three years of field experiments, it was proved that Kecuring can control all kinds of weeds in summer corn fields at one time, and the weed control effect is over 90%, and the persistence period is 60 days. The optimal period of use is 10-15 days after emergence of corn or after emergence of corn, 200-250 ml per mu. Before use, the agent should be shaken and shaken thoroughly. After the agent is added into the sprayer, it should be evenly mixed with water. The amount of water should be 30-35 kilograms per mu. Use windless weather to prevent chemical liquids from floating on sensitive crops such as soybeans, peanuts, and cotton. 6. The general name of the cable is Alachlor (43% EC), also known as grass is not green. The cable is a selective pre-emergence herbicide that can be absorbed by the young shoots of the plant, killing the weeds at the bud stage without unearthing. Before corn seedlings are sown, 150-300 ml per mu and 30-35 kg water are evenly sprayed. The cable is safe for soybeans and is therefore suitable for chemical weeding on corn and soybean intercropping plots.
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