In recent years, the issue of pests and diseases in vegetable greenhouses has become increasingly severe, posing a major challenge for farmers. However, many growers have reported that the effectiveness of pesticides is declining. During a recent visit, reporters observed the spraying techniques used by local farmers and found that their methods were often unprofessional, which significantly reduced the efficiency of pest control.
First, many farmers use a large mist spray, which leads to uneven distribution of the pesticide. This method is especially ineffective for contact-based pesticides, as it fails to cover the plants adequately. Additionally, the large mist tends to cause excessive loss of the chemical solution, particularly when the crops are short. To improve this, farmers should use sprayers with better atomization capabilities and apply a fine mist for even coverage.
Second, some farmers spray directly in front of their bodies, often resulting in them working in an environment already saturated with pesticide. This not only increases the risk of poisoning but also makes it difficult to apply the herbicide evenly. When using closed-system sprayers, improper technique can damage the protective film, reducing the effectiveness of the treatment. It’s recommended that farmers adjust their posture and spray from the side instead of directly in front.
Third, many farmers do not differentiate between sprayer types and spray all crops in the same way. This approach is inefficient. Manual sprayers are best used for direct targeting, while motorized sprayers should be kept about 20 cm above the crop to maximize their performance and efficiency.
Fourth, the reporter noticed that after spraying, a significant amount of liquid dripped from the leaves, sometimes falling directly onto the ground. This reduces the amount of active ingredient on the plant and leads to unnecessary waste. To prevent this, farmers should spray more evenly and reduce the time the liquid remains on the leaves, thereby improving the overall effectiveness of the treatment.
This article was originally published by the China Pesticide Network. Please cite the source if you reproduce it.
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