Clutch weeds

According to a researcher from the Institute of Weeds and Herbicides at the Jiangsu Academy of Agricultural Sciences, a researcher at Yuan Yuanlai introduced that in paddy fields, we can use weeds, such as isoproturon, chlorotoluron, bensulfuron, etc., to sow the wheat fields. Mixing urea or wet fine soil, evenly spreading rice leaves when there is no dew, keeping the fields moist and not standing water, is safe for interplanting wheat, but the herbicidal effect will drop a lot compared with spray application. Keeping the soil moist before and after application can promote the spread of herbicides on the surface and form a tighter layer of medicine. Acetochlor is not safe for use in wheat fields and should not be used in paddy fields.

The occurrence of grassland damage in rice fields is often serious. The weeds in the field are earlier and the grass is mainly pre-winter. Grass weeds began to excavate in the commensal period after rice was sown with rice, and the amount of grass weeds was up to 70% of the total amount of weeds in the field from late October to mid-November; weeds entered the tillering stage in late November. From February to March reached the peak of delivery. It is best to use a combination of soil sealing treatment and stem-leaf treatment in the rice straw wheat field. In recent years, the resistance of common weeds to weeds in the fields of Jiangsu and other places has increased significantly. In fields with complex grassy and severe weeds, it is not appropriate to use straw to plant wheat in full.

Rice stems and leaves of rice straw treatment to control weeds early, more wheat after weeding plots of weeds, weeding with isoproturon, green Mailong and other drugs. These two drugs are effective against most grassy weeds and some broad-leaved weeds, but they have reduced efficacy against older weeds and should be applied before the weed 3-leaf stage. Usually in the 2 to 3 leaf stage of wheat seedlings, spray 50% isopropanol WP 125 to 200 g water and 30 to 40 kg per mu, or use 25% chlorotoluron WP per acre 200 to 250 g, add water 50 Kilogram spray. In wheat fields covered with straw in full quantities, sprayed stem and leaf treatment liquids often cannot spray all the weeds in the field, and it is difficult to spray the whole weeds, which will affect the weeding effect and should increase the amount of water. Spray to increase weeding effect. Isoproturon should not be sprayed before the onset of the cold wave to prevent the occurrence of "frozen phytotoxicity" in wheat. If the grass is older, we can use it to control grass weeds, such as flurazoxylate, flufenoxazone, benzene, etc. Sulfuron, bensulfuron and other drugs prevent broad-leaved weeds.

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