Summer is in the high temperature and rainy season, and weeds in corn fields are common and varied. According to statistics, there are 22 families, 38 genera and 43 species of weeds in corn fields in the country. The main weeds include crabgrass, valerian, foxtail, goosegrass, amaranthus, purslane, iron amaranth, and fragrant aconite. Affected by weeds. The corn seedling stage is the most serious. Corn herbicide control should grasp the corn before and after the seedlings.
What are the herbicides commonly used before and after corn seedlings ? The China Pesticide Network Xiaobian summarizes for you as follows:
Phenoxycarboxylic acid (2,4-chlorosodium salt, 2,4-D-butyl ester); mainly used as a stem and leaf treatment agent, used in cereal crops, conifers, non-cultivated land, pasture, lawn, to control annual and perennial Broadleaf weeds.
Sulfonylureas (nicarsulfuron-methyl, sulfomesulfuron); most of the sulfonylurea herbicides can be used as both pre-treatment agents and post-emergence treatment agents, and some sulfonylurea herbicides can only be used as stems. The leaf treatment agent has a poor effect on soil treatment.
Since the action sites of the sulfonylurea herbicides are single, weeds are resistant to them.
Some sulfonylurea herbicides are long-lasting herbicides that have a long-lasting effect in the soil. After application of these herbicides, phytotoxicity occurs when sensitive crops are planted in the lower jaw.
Amides (acetochlor, alachlor, butachlor, metolachlor, propisochlor) can effectively prevent unearthed annual grass weeds and some small-leaf broad-leaved weeds. Weeds are invalid;
The enemy is a stem and leaf treatment agent, and the soil treatment is ineffective.
Triazobenzene (atrazine, cyanazine, simazine, and chlorpyrifos) soil treatment agents, most of which have the effect of stem and leaf treatment, can be applied before planting, before and after seeding, early in post-emergence, mainly for control The annual weeds have better effects on broadleaf weeds than on weeds, and also on the growth of some perennial broadleaf weeds.
Other common herbicides: paraquat, glyphosate, Fluroxypyr, dicamba, bromoxynil, bentazon herbicides other pesticide products.
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