Autumn wheat field good chemical weeding effect

Chemical weeding in wheat fields in the fall not only saves labor and labor intensity, but also ensures seedlings and weeds in a timely, safe and effective manner. At the same time, they can also clear and cut off intermediate pests and overwintering sites for pests and diseases. This has become an important factor in ensuring high and stable wheat production. technology.

In the autumn seedling stage of wheat (from early October to late November), most of the weeds in the field have been released, and the grass is of a small age. The insecticide resistance is poor, the temperature is relatively stable, and the surface humidity is suitable. At this time, the herbicides that are highly effective on the road are selected to prevent and control the herbicides. Wheat field weeds are more likely to exert normal control effects than spring control. Therefore, we should seize this favorable period and timely carry out chemical weed control in wheat fields.

Chemical weeding in autumn wheat fields, depending on the type of weeds, optional herbicides are: wild oats, barnyardgrass, amazon and other monocotyledonous weeds, available 6.9% of the hummer emulsion 40-50 ml per mu Spray 40 kg stem and leaf on water; control weeds such as phlox, bermudagrass, etc., increase the dose per acre to 70-80 ml, or use 25% isopropenone WP 100-150 g, spraying 30 kg stem and leaf water. Spraying period is suitable for the 3 to 5 leaf stage of wheat.

In wheat fields dominated by dicotyledonous weeds such as wheatgrass, leeks, sow worms, and so on, 75% of superstars can be used as a dry suspension agent, 1 to 1.5 grams per acre, evenly sprayed to 30 kilograms of water, or 20% dimethyl methacrylate per acre. 200-250 ml of chlorine, 30 kg of water sprayed evenly in the 3 to 5 leaf stage of wheat. To control weeds in grass fields and broadleaf weeds mixed with weeds, we can use 55% prussic emulsions 125-150 ml per mu for the true leaf stage, spraying 40 kg of stems and leaves for water, or 22.5% per mu. Dragon Emulsion 80 ml plus 6.9% Daimaru emulsion 50 ml, in the 3 to 5 leaf stage of wheat, spraying 40 kg stem and leaf water.

To control weeds in wheat fields dominated by broad-leaved weeds such as rice leeks, cattle bred, and motherwort, use 20% per acre to make it grow 40-50 ml, spray 40 kilos of stems and leaves, or use per acre. 75% of Superstar Dry Suspension 1~1.5g in the 3~5 leaf stage of wheat, spraying 40kg of stem and leaf water; or 50% of Usda wettable powder 3~4g/mu, in the 3~5 leaf stage of wheat 40 kg of stem and leaf spray on water.

Less no-tillage wheat field weed control. The occurrence of weeds is characterized by a concentration of grass time, a large number of grasses before the winter, an early peak of the grass, and an early danger. Therefore, it is early to control, and the emphasis is on medication before and after sowing. For the first time, within 3 to 7 days before sowing, use 10% glyphosate per acre 200-300 ml, spraying water and 50 kg of stems and leaves to control weeds. The second time according to field grasses, there are targeted prevention and treatment. Japan sees acacia and hardgrass mixed grasses such as grass weeds and broad-leaved weeds. Each acre can use 80% Kusaoqing 2~3g or 50% Isoproturon 125~150g, 50kg water, in the mix. Grass 1 to 2 leaf sprays. For wheat fields with precocious stubble and hard grass, 50% isopropanol or 50% hyperosmotic isoproturon 125-150 g per mu can be used, and 50-60 kg water can be sprayed.

Weed control wheat field weeds. This kind of wheat field is relatively heavy, especially monocotyledonous weeds. It must be removed immediately after rice is harvested. Generally, 400 grams of green mellon can be used per mu and 30 kg of water can be sprayed or mixed with fine soil. Kilograms are evenly spread, or in the 4 to 5 leaf stage of weeds, 60 ml of 6.9% of hummer are used per mu and 40 kg of water is sprayed.

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