The reasonable use of thiasulfuric acid and acetochlor for soil sealing in wheat field has good herbicidal effect. Jiangsu Futian Agrochemical Co., Ltd., Beijing Shunyi Bio-Pesticide Factory, 20% thiasulfuric acid acetochlor WP, containing 1% thiophenesulfuron and 19% acetochlor, registered for use in wheat field soil spray to control annual weeds The recommended dosage of pure medicine per hectare is 240-300 grams, which is 0.8-1 gram per mus of thifensulfuron-methyl and 15.2-19 gram of acetochlor. Zhejiang Tianyi Agrochemical Co., Ltd. 50% thiasulfuric acid acetochlor wettable powder, containing thiophenesulfuron 2%, acetochlor 48%, registered for use in wheat field soil spray to control annual weeds, recommended per hectare The dosage is 525-600 g, which is 1.4-1.6 g of thifensulfuron-methyl pure drug and 33.6-38.4 g of acetochlor pure drug per mu. Wheat is sensitive to acetochlor. After sowing, the soil is blocked with acetochlor before sowing. The dosage should not be too large. The soil moisture should not be too large in the short term after application, especially if it can not accumulate water for a long time. Wheat causes phytotoxicity. Acetochlor mainly inhibits the growth of plant shoots and young roots, and the medicated wheat seeds are not easy to emerge. Even if they can emerge, the seedlings are weak and easy to stand. In the application of herbicide containing acetochlor in wheat field, the ditch should be opened in advance to ensure that no water is accumulated in the field before the application of wheat seedlings, avoiding application before rain; if it is rained after application, it should be drained and dehumidified in time. There should be no water in the field. If the soil moisture is appropriate, thiabendazim can be applied within 3 days after the wheat is sown, and the wheat cannot be used after germination.
70% bensulfuron-isoprozide wettable powder of Suzhou Baodai Pesticide Co., Ltd., containing bensulfuron-methyl 2%, isoproturon 68%, registered for winter wheat field spray to control annual weeds, pure drug per hectare The recommended dosage is 1,050-1,260 grams, which is 100-120 grams per acre. Bensulfuron-methyl and isoproturon have both soil closure and stem and leaf treatment herbicidal effects. The wheat field can be closed with 70% bensulfuron-isopropion 100 g per acre, and the dosage can be adjusted according to the soil moisture.
Bensulfuron-methyl sulfonylurea selective systemic herbicide can be absorbed by weed roots and leaves to all parts of weeds, hindering the biosynthesis of amino acids, lysine and isoleucine, and preventing cell Splitting and growing, the growth of sensitive weeds is blocked, the young tissues are yellowed prematurely, and the growth of leaves and roots is blocked and necrosis. The drug is less mobile in the soil. It is safer for wheat seedlings and crops. When used as a stem and leaf treatment in wheat fields, it is used in the seedling stage of broadleaf weeds, using 3 grams of pure medicine per acre, and 4 grams of pure medicine per acre when the grass age is large. Spraying method, adding 30 kg of water per mu, the water consumption per mu increased to 50 kg in case of drought. It is beneficial to exert the effect of the drug during the high temperature period.
Isoprocarb has a wide spectrum of herbicides, and it has good control effect on most species of grass weeds in wheat fields such as Mai Niang, Japanese maiden, hard grass, alfalfa, bluegrass and wild oats. The herbicidal effect is good. The application period is wide, and can be applied from wheat sowing to jointing stage. The residual period of the drug in the soil is short, and the safety of the crop is high. Isoproturon has good safety to wheat, but it will reduce the anti-freezing ability of wheat seedlings. It should be applied to the "cold tail warm head" application after low temperature, and it will easily produce "frozen phytotoxicity" in the short-term after cold application. The wheat seedlings are yellow and their growth is inhibited.
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(Source: Pesticide Newsletter)
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