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一是忌用井水、污水配药。井水中含有钙、镁等矿物质较多,与药液易起化学反应生成沉淀物,从而降低药效。污水含杂质多,配药会堵塞喷头,还会破坏药液的稳定性。同时,污水里的一些成分也会与药液发生化学反应,降低药效。二是忌滥用农药、一药连用。应根据作物种类、防治对象和药剂性能的不同而采用相应的农药,做到对症下药,忌盲目增大施药量,造成害虫抗性增强降低了防治效果,还容易产生药害。另外,
First, avoid using well water, sewage pharmaceuticals. Well water contains calcium, magnesium and other minerals more easily react with the chemical solution to generate sediments, thereby reducing efficacy. Sewage with more impurities, dispensing will block the nozzle, but also undermine the stability of the liquid. At the same time, some of the sewage in the chemical composition of the chemical reaction will be, reduce efficacy. The second is to avoid abuse of pesticides, a drug used. Corresponding pesticides should be used according to the type of crops, the object of prevention and the performance of the medicaments, so that the right remedy should be avoided, blindly increasing the dosage, causing the pest resistance to be enhanced, reducing the prevention and control effects, and causing phytotoxicity. In addition,