Spring wheat field has good effect on weeds and thiophenesulfuron

In Shanxi Jinnan area, due to planting time and climate reasons, most of the time weeding in wheat fields is mainly weeding in spring. Since the beginning of chemical weeding in wheat fields, the selection of herbicides is mainly based on bensulfuron-methyl. It is sensitive to certain crops, so many wheat weeds have developed resistance problems and the problem that fensulfuron has phytotoxicity or can not be planted on some sensitive crops. After comparative experiments, the use of thifensulfuron instead of bensulfuron-methyl has many advantages in weeding in wheat fields.

Thiosulfuron-methyl is also referred to as thiasulfuron-methyl, and its trade name is broad-leaf powder, Baoshou, wheat-green, wheat haha, etc. It is a system of post-inducing post-emergence treatment, which is very high between cereal crops and broadleaf weeds. Selective, can be used in wheat fields, corn fields to control annual broadleaf weeds, such as sown wormwood, sorghum, burdock, leeks, pork chop, wheat grass, buckwheat vine, Maijiagong, big nest , pig's head, wolf, grass, sorrel, scorpion, sorrel, blue cabbage, stalk flower, broccoli, wild watermelon seedling, wild mustard, sheep's hoof, duck's grass before 3 leaves. It has a certain inhibitory effect on perennial grasses such as leeks, thorns, stalks, and flowers. The weeds were damaged after taking the medicine for more than ten hours. Although they remained green, they stopped growing. After 1-3 weeks, the leaves of the growing point began to turn green and yellow, and the surrounding leaves drooped. Then the growth point died and the grasses shrank. Finally the whole plant died. Individual undead grasses are seriously inhibited from growing and atrophy under the wheat or corn plants, making it difficult to flower and bear.

The selectivity of thifensulfuron is very high, it is safe for wheat and corn, and the agent is rapidly degraded into sugar in wheat, which does not affect the normal growth of wheat. Thiofenesulfuron is rapidly decomposed by aerobic microorganisms in the soil, and the residual effect period is only 30 days. Therefore, it has no effect on the post-crop crops such as peanuts, soybeans, sesame seeds, cotton, rice, vegetables, flowers, etc. after use in wheat fields. Long, chlorsulfuron, and metsulfuron are safer.

The thifensulfuron product has 10%, 15%, 25%, 30%, 70%, 75% wettable powder and 75% dry suspending agent.

In the wheat field, 1.5-2.5 grams of active ingredient is used in the two-leaf to early-earning stage of wheat and barley, of which 1.5-1.8 grams is used in the wheat area of ​​the Yangtze River Basin, 1.8-2 grams is used in the wheat area of ​​the Yellow River Basin, and northeast and northwest wheat are used. Use 2.1-2.4 grams in the area, high dose should be used under drought conditions or when the weed density is high, the grass is large and the temperature is low. The amount of the formulated preparation is 10% wettable powder 15-25 g or 15% wettable powder 10-16.7 g or 25% wettable powder 6-10 g or 75% wettable powder (dry suspending agent) 2-2.7 g, Water 30-40 kg, spray the stems and leaves. Adding 0.125%-0.2% neutral detergent in the spray solution can significantly improve the efficacy; generally, the backpack-type manual sprayer can charge 12.5 kg of water per barrel, and can add 25 grams of washing powder. Apply before winter, do not apply when the temperature is below 5 °C.

By contrast, the local use of thifensulfuron has at least four major benefits over the use of bensulfuron:

1. The residual effect period is short, the long-lasting period of application is only 30 days, 30 days less than benzenesulfuron, used in wheat field, 2 leaf stage to booting stage after seedling, 1 year old broadleaf weed seedling stage before flowering Can be applied.

2. There are more than 20 kinds of weeding species. More than 10 species than fensulfuron.

3. For a variety of crop safety such as peanuts, corn, sesame, soybeans, cotton, vegetables, flowers, etc.

4. There are few areas of use, and no species of weeds have been found to be resistant.

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