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Low-toxic pesticides can not be multi-spray
At present, many farmers mistakenly believe that high-toxicity pesticides are more effective, leading to improper use. Instead of using a measuring cup or following guidelines, they rely on intuition, often mixing three or four different pesticides together, thinking this will improve the control effect. However, this approach not only increases costs but also reduces effectiveness and can harm crops and the environment. Some farmers also misunderstand the safety of low-toxicity, low-residue pesticides, thinking they can be applied multiple times without consequences. They lack awareness about critical factors such as when to spray, which products to choose, and how long to wait before harvest.
Proper pesticide application should always follow the instructions on the label, including the recommended dosage and safety intervals. For example, when controlling Botrytis cinerea during the flowering stage, it is advised to spray only 1-2 times. Pesticides like acetamiprid, spinosad, or chlorfenapyr can be used, with a 14-day safety interval. For citrus spider mites, spraying should be limited to two applications per season, with at least 14 days between the last application and harvest. In the case of vegetable diamondback moths, using Frigop requires only a 3-day safety interval.
Additionally, some farmers assume that biological pesticides are completely safe. However, even these must be used carefully. For instance, abamectin, a biological insecticide used for controlling spider mites on cotton, should not be applied more than twice per season, and the last application should be at least 21 days before harvest.
In conclusion, incorrect pesticide usage poses a major risk to the safety of agricultural products. Farmers need better education and guidance to ensure responsible and effective use. Understanding label instructions, following safety intervals, and avoiding unnecessary combinations are essential steps toward sustainable and safe farming practices.
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