Herbicide application in wheat fields requires careful timing, selection, and technique to ensure effectiveness while minimizing damage to crops. Many farmers tend to apply herbicides in spring, waiting until weeds are more mature and densely populated. However, this approach often leads to increased herbicide resistance, requiring higher dosages that raise costs and risk phytotoxicity to wheat, its pupae, and neighboring crops. For instance, using 48% chlorpyrifos or 2,4-D during the grain-filling stage of wheat can prevent seed formation. Based on years of trials and field experience, it is recommended to apply herbicides before winter. This typically involves pre-emergence treatments before wheat sprouts or post-emergence applications when wheat has 2–4 leaves.
Choosing the right herbicide is equally important. Different herbicides target different weed species. Some have very narrow spectrums, such as those effective only against wild oats. Others, like dimethyltetrachloride, work well against sage, horseshoe, and wild oatmeal but are less effective against pigweed. Similarly, 2,4-D controls broadleaf weeds but not grasses. Farmers should select herbicides based on the dominant weed species in their fields. Products like weeding nets, earth grass nets, bensulfuron-methyl, and Baijia mixtures are effective against broadleaf weeds, while metsulfuron-methyl and chlorsulfuron-methyl are suitable for rice-wheat rotations. Using them in other crops like cotton, corn, or peanuts can cause severe phytotoxicity, leading to serious crop damage.
Proper dosage control is crucial, as herbicides are not completely selective. Overuse can harm wheat, while underuse may fail to control weeds effectively. Always follow the manufacturer's instructions and adjust based on local conditions. Soils with high organic matter and fine particles tend to adsorb more herbicides, reducing their availability. In contrast, sandy loam soils have lower adsorption, making herbicides more active and potentially toxic. Alkaline soils also affect herbicide stability, causing longer residual effects and possible crop injury. Therefore, herbicides should be applied early in such conditions and used cautiously.
Temperature and humidity play a key role in herbicide efficacy. According to the Chinese Pesticide Network, low temperatures reduce the effectiveness of certain herbicides, such as 2,4-D and metformin, below 10°C. Higher temperatures improve performance. The Superstar herbicide, for example, shows better results after 30–40 days at low temperatures. It’s best to apply herbicides on warm, sunny days to maximize their impact. Soil moisture is also essential—adequate moisture helps herbicides penetrate the soil and be absorbed by weeds, increasing their effectiveness.
Finally, proper spraying techniques are vital. Herbicides should be diluted properly and mixed thoroughly to ensure even coverage without over-application or missed spots. If adjacent fields contain sensitive crops, protective measures should be taken to avoid drift caused by wind. It’s advisable to use dedicated herbicide sprayers to prevent cross-contamination. If no special equipment is available, all tools must be thoroughly cleaned with bleaching powder after herbicide use to avoid damaging other crops later.
Light Steel Villa
What are the characteristics of light steel villas? Is it suitable for long-term use?
Light steel villas are very popular and fashionable. They are a kind of Prefabricated House. They are the Customizable Series Products of our company. In fact, they are mainly villas assembled with new materials. Moreover, it uses high-strength light steel keels for construction, which guarantees stability, and the construction cost is also very favorable, and the construction of the villa can be completed quickly. So what are the characteristics of this type of villa? Is it suitable for long-term use?
Strong shock resistance
Many people are more worried that such villas cannot resist earthquakes and are not safe enough. In fact, it adopts a light steel structure, the building is light in weight, and the metal materials can guarantee a long service life. As long as the design is reasonable and the structure is stable, its seismic performance is also guaranteed.
Good windproof performance
The light steel villa adopts the mode of light steel keel and foundation installation, and expansion bolts, anti-pull parts, etc. are used in the middle, and the installation stability is also guaranteed. The wind resistance of this type of villa can reach 12 typhoons, and it can be used even in some cities with harsh environments.
good sound insulation
After all, the villa is still a residential area, no matter what type of material it is, it is necessary to determine its specific sound insulation effect. The sound insulation effect of the wall is good, and some materials for heat preservation and sound insulation can also be added to ensure good sound insulation effect. At the same time, the indoor living comfort is also very good.
good warmth retention
The heat preservation of light steel villas is good, because the villas are made of thermal insulation fiber cotton, maintenance panels, etc., and the thermal insulation performance is also good. Therefore, when building a villa, we must also pay attention to the specific conditions of its materials. High-quality materials that are thermally insulated and can ensure a long service life are our first choice.
Good environmental performance
The reason why light steel villas are now being used in many areas is mainly because they are cheap and have good environmental protection performance. Its materials can save a lot of wood, plastic steel, etc., and the construction is convenient, and the steel can be used repeatedly without causing environmental pollution.
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Henan Jinming Metal Material Co., Ltd. , https://www.jinminghouse.com