In recent years, the issue of pests and diseases in greenhouses has become increasingly severe, posing a growing challenge for vegetable farmers. However, many farmers have reported that the effectiveness of pesticides is declining. During a recent visit to several farms, reporters noticed that the spraying techniques used by farmers were often improper, which significantly reduced the efficacy of the pesticides.
First, many farmers use a large mist spray, which leads to uneven coverage. This method is especially ineffective for contact pesticides and causes excessive waste, particularly when plants are short. To improve efficiency, farmers should use sprayers with better atomization and apply a fine spray film for even distribution.
Second, some farmers spray directly in front of their bodies, which puts them at risk of pesticide exposure. This technique also results in uneven application, especially when using herbicides. The correct approach is to spray in a side "Z" pattern instead of directly in front, ensuring better coverage and reducing health risks.
Third, many farmers do not differentiate between types of sprayers and simply target crops directly. Manual sprayers can be used for direct spraying, but motorized sprayers should be kept about 20 cm above the crop to maximize atomization and efficiency.
Fourth, some farmers notice that after spraying, liquid drips off the leaves and onto the ground, reducing the amount of pesticide that actually adheres to the plant. This not only lowers effectiveness but also causes unnecessary waste. To prevent this, farmers should spray more evenly and reduce the time the solution remains on the leaves.
The article was published by the **China Pesticide Network**. Please cite the source!
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