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目前农户中普遍存在着土地较少,而又要同时种植几种作物,病虫防治需要应用范围广、毒性低、使用安全的化学农药;有机磷类杀虫剂辛硫磷具有这一功能。辛硫磷为棕黄色液体,出售的剂型有50%乳油、3%、5%颗粒剂。辛硫磷在中性、弱酸性条件下稳定,遇碱性条件易分解。在阳光照射尤其是紫外线照射下很快光解失效。辛硫磷主要是对害虫胃毒、触杀作用。大田喷雾保持药效2—4天,在土壤中保持药效达1—2
At present, there are few land farms in common households, but several kinds of crops should be planted at the same time. Pest control needs a wide range of applications, low toxicity and safe use of chemical pesticides. Phosphorus, an organophosphate insecticide, has this function. Phoxim is a brownish-yellow liquid and is sold in dosage forms of 50% cream, 3%, 5% granules. Phoxim is stable under neutral and weakly acidic conditions, and decomposes under alkaline conditions. In the sun, especially UV light irradiation quickly failure. Phoxim is mainly on stomach pests, contact effect. Field spray to maintain efficacy 2-4 days in the soil to maintain efficacy of 1-2