辛硫磷属有机磷杀虫剂,广泛应用于粮、油、棉、桑、茶、烟草、果树、蔬菜等作物害虫的防治。国内生产的剂型主要有50%乳油、5%的颗粒剂、25%油剂等。辛硫磷的主要优点是(一)高效。据试验用50%乳油2,000倍液,防治菜蚜、菜青虫、小菜蛾等,30分钟内杀虫率即可达99%以上。用50%乳油1,000倍药液,防治棉铃虫、烟青虫、玉米螟等,一月内杀虫效果可达100%。(二)低毒。对人、畜毒性较低,据试验,雄性大白鼠急性口服致死中量为2,170毫克/公斤;雌性大白鼠为1,882毫克/公斤;鲤鱼致死浓度为0.1—1ppm,金鱼1一 Phoxim is an organophosphorus insecticide that is widely used in the prevention and control of crop pests such as grain, oil, cotton, mulberry, tea, tobacco, fruit trees and vegetables. Domestic formulations are mainly 50% EC, 5% granules, 25% oil and so on. The main advantages of phoxim are (i) high efficiency. According to the test with 50% EC 2,000 times solution, control aphids, Pieris rapae, diamondback moth and so on, the insecticidal rate within 30 minutes up to 99%. With 50% EC 1, 000 times liquid, control bollworm, tobacco budworm, corn borer, insecticidal effect in January up to 100%. (B) low toxicity. To humans, animal toxicity is low, according to the test, the male rat acute oral mortality in the amount of 2,170 mg / kg; female rats 1,882 mg / kg; carp lethal concentration of 0.1-1ppm, goldfish 1