Introduction of herbicide types

1. Amide herbicides : It is the most important herbicide in corn field. It can be absorbed by weed buds. The soil is sealed before weeds to effectively control annual grass weeds and some annual broadleaf weeds. There are many varieties of such herbicides, such as acetochlor, alachlor, butachlor, metolachlor, and propisochlor. The test proved that the herbicidal activity comparison results were acetochlor > metolachlor > propisochloramine > butachlor > alachlor at the same effective dose; according to its effective amount, the quantitative comparison result of herbicidal activity was B. Oxalamide: Metolachlor: Butachlor: Isoprost is 1:0.9:0.8:0.7; this type of herbicide is greatly affected by moisture and the herbicidal effect is significantly reduced when the moisture is poor.

2. Triazine herbicides: It can effectively control annual broadleaf weeds and annual grass weeds, mainly based on weed roots, and can also be absorbed by weed stems and leaves. Representative varieties are atrazine, cyanazine, simazine, chlorfenapyr, etc., which are used more in atrazine, which is safer and more active for corn; but it is mixed with acetochlor to reduce the dosage. Improve herbicidal effects and safety for crops.

3. Phenoxycarboxylic acid herbicides: mainly to control broadleaf weeds and fragrant aconite after corn seedlings. Representative varieties are 2 methyl 4-chloro sodium salt, 2,4-D butyl ester. Among them, 2 methyl 4-chloro sodium salt is widely used in the corn field to control the fragrant aconite, but the use period is not easy to produce phytotoxicity.

4. Sulfonylurea herbicides: Nicosulfuron-methyl and sulfamesulfuron can be used in corn field to control grass weeds, sedge weeds and some broad-leaved weeds, and timolone can be used for corn field control Annual broadleaf weeds.

5. Other herbicides: Paraquat and glyphosate are herbicides that can be sprayed at a height of 40 cm in corn to effectively control a variety of weeds. They can also be used to make it, chlorpyrifos, bromoxynil, Bentazon and other varieties control broad-leaved weeds in corn fields.

More pesticide knowledge , please pay attention to China Pesticide Network

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