Significantly effective weeding in winter wheat fields

Due to the good basis for wheat planting in autumn this year, high temperatures in winter, suitable humidity in the field, and heavy weeds in wheat fields in some parts of Shandong Province, timely prevention and control should be implemented to ensure high yield and stable production of wheat in the next year.

According to the survey, the weeds in the winter wheat fields such as Zeze, Maijiagong, and Bristles are serious, the weed density is 30-120 strains/m2, and the individual serious blocks are more than 150 strains/m2. At present, because of the high temperature and suitable conditions in wheat fields, there are still weeds unearthed, and the emergence rate reaches 80-90% of the total seedlings.

Since the growth of weeds was small, the roots were not deep, the leaves were not strong, and the anti-drug resistance was poor. At this time, the weeds were young, the waxy layer was thin, and the wheat seedlings were small, the canopy density of the wheat fields was small, and the weeds were The exposed area is large and the drug resistance is poor. Spraying herbicides at this time, the sprayed liquid has a large contact surface with the weeds, which helps the weeds absorb more chemicals and the herbicides are easy to exert. Therefore, chemical weeding in wheat fields in winter does not only save labor and reduce labor intensity, but also protects seedlings, eliminates grass in a timely manner, and is safe and effective. At the same time, it can also eliminate and cut off intermediate host and overwintering sites for pests and diseases, which is conducive to the high and stable production of wheat.

Farmers in some parts of Shandong have achieved good results through the use of herbicides in winter. However, when herbicides are used at low temperatures in winter, they are not as effective as the seasons when the temperature is high in summer and autumn, and they may not be effective in the short term. The main reason is that due to the low temperature conditions, on the one hand, the herbicides have poorer drug release, and on the other hand, the weeds' absorption capacity also decreases. The pesticides are slowly absorbed and slowly weeds. Absorption decomposition, so that the effect is reduced or even completely defeated. Therefore, when herbicides are used at low temperatures, in addition to herbicides on the road, the following points should be noted technically:

First, choose the best prevention and treatment time. From mid-November to early December, wheat seedlings grow to 4 leaves, which is the best time for weeding in wheat fields. At this time, most of the weeds have just been excavated. The resistance to insecticides is poor and the control effect is good. The primary Application of pesticides can basically control the weeds in the whole growth period, and due to the earlier application time and less herbicide residues, the impact on the crops of the rear crops is also small. . However, when herbicides are used at low temperatures in winter, their efficacy is significantly longer than when herbicides are used at high temperatures. It usually takes 12-15 days for herbicides to appear. In the high-temperature summer period, the control of Setaria viridis in the farmland is generally within 5-7 days. Therefore, it is important to wait patiently after taking the medicine. If the timing is good enough, the liquid spray is in place and it is generally not necessary to re-administer the medicine.

Second, strictly control the dosage. Water should be added strictly according to the dilution factor, and the amount of water should not be arbitrarily reduced. When spraying, it is necessary to pay attention to thoroughness and uniformity, not to re-spray, and not to spray. All weeds must be sprayed with herbicides, otherwise they will be futile; if the amount of herbicides is too large, it will cause crop damage and pollution. , Even after the adverse effects on the crop after the crop; if the dose is too small, the control effect of weeds is poor, will not achieve the role of weeding and wheat. Therefore, when applying herbicides must be strictly controlled dose, generally mu dose of 30 to 40 kg.

Third, pay attention to the quality of spraying. When herbicides are used, they must be strictly followed in accordance with the technical operating procedures. Since the winter season is relatively low, winds are often accompanied by strong winds, which is not conducive to the exertion of efficacy. Therefore, the application of pesticides should be carried out at relatively high temperatures in sunny days. At this time, the physiological metabolism of weeds is relatively strong, which is conducive to the conduction of pesticides in the weeds and is likely to receive better weeding effects. For example, after entering December, wheat fields use weeds to control weeds, and it is basically difficult to kill weeds. In particular, herbicides such as isoproturon cannot be used when the temperature is too low, and should be above 10°C. Spray control. If the spraying time is too early or too late, pesticides can easily fall into the ground, causing waste and contaminating the soil. At the same time, the long-living herbicides chlorsulfuron-methyl and metsulfuron-methyl should be deactivated. These two kinds of pesticides are liable to produce phytotoxicity to crops after use in wheat fields.

Ampoules are developed for sensitive medication for only contacting with glass. Zhengli provides neutral glass, easy break and smooth cut ampoules manufactured by most advanced equipment. Ampoule is good for sensitive drugs. Based on stringent process and quality control, Zhengli ampoules features easy break and smooth cut surface. All Zhengli ampoules are manufactured and packed consistent with ISO 9001 and ISO 15378 standard.

we are specialized in Pharmaceutical Ampoules,Color Break Ampoules,One Point Ampoules,Amber Pharmaceutical Ampoules, Medical Ampoules

Related Products:color break ring ampoules,one point ampoules,type b ampoules,type c ampoules,type d ampoules,type e ampoules,medical ampoules.

Pharmaceutical Ampoules

Pharmaceutical Ampoules,Color Break Ampoules,One Point Ampoules,Amber Pharmaceutical Ampoules,Medical Ampoules

Ningbo Zhengli Pharmaceutical Packaging Co., Ltd. , http://www.zlpharmapkg.com