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 effectiveness, quick results, labor-saving nature, and cost efficiency. However, despite these benefits, many challenges arise during herbicide use. Some farmers report that although they apply herbicides, weeds still survive. Others mention that while the herbicides kill some weeds, the overall effectiveness is low. Some express concern that the herbicides may harm crops, and others complain that the herbicides damage the seedlings of the next growing season by affecting the current crop’s growth. Faced with these issues, it's important to understand the root causes and take appropriate measures to maximize the effectiveness of herbicides. First, choosing the right type of herbicide is crucial. The effectiveness depends largely on the specific weed species present. For example, if a field has many monocot weeds, using a herbicide designed for dicots will not be effective. On the other hand, if the field is dominated by dicots, a herbicide targeting monocots might also work, but not optimally. There are various types of herbicides available, such as amide, sulfonylurea, nitrobenzene, organophosphorus, and phenoxy-carboxylic acid herbicides. Each has different application timing—some should be applied before planting, others during sowing, and some after the seedlings emerge. Misapplication based on timing can lead to poor results or even negative effects on the crops. Another key factor is making the most of ecological conditions. Even with the right herbicide, improper application due to environmental factors can reduce its effectiveness. For instance, light-sensitive herbicides like Fluramine and Diltiazem must be covered with soil before sowing to prevent photolysis and volatilization. Temperature also plays a critical role—both high and low temperatures can cause plant toxicity. The best results occur within an optimal temperature range. Humidity and soil moisture are equally important for dryland herbicides. If the soil is too dry, the herbicide may not work well. However, applying it after a rain can significantly improve its effectiveness. Lastly, improving application techniques is essential. According to the China Pesticide Network, here are five key tips: first, accurately determine the application rate. For example, glyphosate used on drought-resistant crops requires 200–300 grams per acre, while controlling dodder in soybean fields only needs 4 grams per acre. Second, apply herbicides at the right growth stage of the crop. For instance, 2,4-D can cause phytotoxicity before rice tillering but becomes effective for controlling broadleaf weeds and sedges during this period. Third, consider the fertility level of the weeds. Fourth, choose the application method—surface, spot, or directed—based on the crop and weed type. Finally, adjust the application based on environmental factors such as temperature, light, and humidity for better performance.

Square Head Bolt

The square head Bolt has a large size, which is convenient to use a wrench or use other parts to prevent rotation. Mainly used for rough structural surface and parts with T-shaped groove.

Square Head Bolt,Square Head Lag Bolts,Square Headed Screws,Square Head Lag Screws

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