In many people's consciousness, if the toxicity of low-toxic pesticides is not strong, they can increase the dosage more at will. In fact, this is a misunderstanding of the lack of understanding of the safety of pesticides. Low-toxic pesticides or low-residue pesticides should also be used. , can not be increased or decreased at will.
When spraying low-toxic pesticides, the instructions and recommended dosages on the pesticide packaging or label should be strictly observed, and the safety interval should be paid attention to. For example, if you want to control tomato gray mold, you can spray 1-2 times when the tomato is blooming. You don't need to spray more, but the pesticides can choose low-toxic pesticides or low-residue pesticides such as chlorhexidine, schard, and chloramphenicol. The safety interval of these pesticides is 14 days; if it is necessary to control the red spider on the citrus, it is also endangered twice in each season, not sprayed, and needs to be completed 14 days before the harvesting period; For the diamondback moth in vegetables, you can choose Regent, which has a small safety interval and can be used in 3 days.
In addition, it should be noted that biological pesticides , like low-poison pesticides, are not safe to spray, and failure to master the method can cause phytotoxicity. For example, in the case of bio-pesticide avermectin (insecticide), it can treat red spider on cotton. It can not be used multiple times in each season. It can be sprayed up to 2 times, and its last application requires at least 21 during the harvest period. More than a day.
China Pesticide Network http://
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