Using herbicides

At present, there are thousands of herbicides available on the market. Farmers have gradually accepted and started using chemical herbicides due to their efficiency, quick results, labor-saving benefits, and cost-effectiveness. However, despite these advantages, many challenges still exist when using herbicides. Some farmers mention that even after applying herbicides, weeds are not completely eliminated. Others report that while the herbicides do kill weeds, the effectiveness is not always satisfactory. Some complain that the herbicides harm crops in addition to killing weeds, while others say that the herbicides used this season negatively affect the seedlings of the next season. To address these issues, it's important to analyze the root causes and take appropriate measures to maximize the herbicidal effect. First, choosing the right herbicide is crucial. The effectiveness of herbicides largely depends on the type of weed present. For example, if the field has a lot of monocot weeds, using a herbicide designed for dicots won’t be effective. On the other hand, if the field is dominated by dicots, some herbicides meant for monocots may also work, but with limited success. Herbicides come in various types, such as amide, sulfonylurea, nitrobenzene, organophosphorus, and phenoxy-carboxylic acid herbicides. Each has specific application times—some should be applied before planting, others during sowing, and some after seedlings emerge. Applying them at the wrong time can lead to poor results or even crop damage. Another important factor is making full use of ecological conditions. Even with the correct herbicide, improper application due to neglecting environmental factors can reduce effectiveness. For instance, herbicides like fluramine and diltiazem are sensitive to light and must be covered with soil before sowing to prevent photolysis and volatilization. Temperature also plays a key role—extreme temperatures can cause phytotoxicity, so the best results occur within an optimal temperature range. Dryland herbicides require proper humidity and soil moisture; applying them without sufficient moisture can significantly reduce their effectiveness. However, applying them after rain can improve their performance. Improving application techniques is another critical step. According to the China Pesticide Network, here are five key tips: First, accurately determine the dosage. For example, glyphosate requires 200–300 grams per acre for drought-resistant crops, but only 4 grams per acre when controlling dodder in soybean fields. Second, apply herbicides at different growth stages of the crop. For example, 2,4-D can cause phytotoxicity before rice tillering but is effective for controlling broadleaf weeds during tillering. Third, adjust treatment based on weed fertility. Fourth, choose the application method—surface, spot, or directed—depending on the crop and weed type. Lastly, apply herbicides flexibly according to weather conditions, such as light, temperature, and humidity. By following these guidelines, farmers can achieve better results, reduce crop damage, and ensure more sustainable and efficient weed management.

Hexagon Slotted Nut

Hexagon slotted nut, that is, the groove is machined above the hexagon nut. It is used in conjunction with threaded Bolt with hole and cotter pin to prevent the relative rotation of bolt and nut. Hexagon slotted nut is generally used in vibration and impact situations. After the nut is fastened, it needs to be equipped with cotter pin hole and installed with cotter pin. Such as lifting equipment, artillery, press, die-casting machine, etc.

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