Soil sealing treatment is the first and the most important aspect of chemical weed control in wheat fields, and can significantly reduce the number of weed bases in winter wheat fields. The weeds that germinate after the beginning of spring are much younger than wheat seedlings, and are easily filled with stem and leaf treatment agents. In addition, medication costs and labor costs can be greatly reduced. In the process of soil treatment, the contact between the medicament and the wheat seedlings is reduced, and the possibility of the occurrence of the phytotoxicity is also reduced. In recent years, in the context of the treatment of herbicide resistance by some weeds on some stems and leaves, the effect of sealing treatment is even more important. At present, the production mainly uses isoproturon and its compounding agent for soil sealing treatment, and the drug also has both stem and leaf weeding effects.
"For late sowing, it is more important to eliminate the soil before seedling after sowing." Qiu Guang, Jiangsu Suko Agrochemical Co., Ltd. recently reminded reporters in an interview. The temperature of late sowing wheat is generally low, and the time for emergence of wheat is elongated. If you wait until after emergence, you are faced with a large probability of a significant decrease in temperature. The temperature range suitable for weeding stems and leaves is narrow, and it is easy to miss the best. During the period of medication, such as the use of isoproterenol and other drugs, the occurrence of "frozen phytotoxicity" is more likely.
Closed treatment of soil in wheat fields, some areas are used to medication immediately after sowing. According to Qiu Guang's introduction, many years of production practice have shown that it is appropriate to postpone the use of drugs and to control the use of drugs before the needles in wheat. The effect of closed weeding is better. This is because short-term after sowing wheat soil pellet structure is unstable, easily broken, the use of soil to close the treatment agent can not form a tight layer of medicine, will affect the sealing effect. It is generally advisable to use the medicine immediately after germination when wheat is sown. On the one hand, the soil is already solid, which is conducive to the formation of a stable layer of medicinal soil. On the other hand, grasses and weeds have emerged buds and roots, which are beneficial to the absorption of drugs in the soil and improve the weeding effect. At the same time can also take part in broadleaf weeds that emerged before winter. The emergence time of wheat is greatly affected by factors such as temperature and moisture. It is recommended to check the germination process of wheat in a timely manner in order to more reasonably determine the time of application. It is necessary to remind that at this time pay attention to dredge the ditch of wheat fields to prevent continuous rain water; use drugs that protect the growth of wheat sprouts, avoid the use of acetochlor-containing drugs, and prevent burning of water when water accumulates.
“On the basis of selecting the pharmaceuticals, the use of sufficient water will help the drug to form a tighter soil layer in the soil, thereby enhancing the effect of sealing and weed control. Even if the soil moisture in the field is appropriate, the water consumption cannot be arbitrarily reduced.†Qiu Guang reminded. General requirements for water consumption per mu is about 50 kg, coarse spray. If large spray machinery is used for spraying, the amount of water used needs to be increased.
Self-Inflating Sandbag,Sandless Flood Bags,Instant Sandless Bag,Gel Bags For Flooding
Denilco Environmental technology(Suzhou)Co., Ltd. , https://www.wflood.com