食用碱一直是人们饮食之用,用于防治大田作物害虫未见有关资料报道,我国桔区过去防治蚧类害虫都采用化学农药和松脂合剂,但由于有机化学农药毒性高,容易杀伤天敌和导致害虫抗性,松脂合剂也因受原料的不足、配制、使用又较烦琐和易产生药害的限制,不能大量采用。经1986年反复试验喷施碱液后,由于碱自有吸潮作用,喷后的树冠露水上来早、量多、均匀,遇上低湿天气未形成露水的情况下,喷了 Alkaloids have always been people’s diet, for the prevention and control of field crop pests No relevant information reported in the past, the orange zone in our country to prevent insects Kuwana chemical pesticides and pine resin mixture, but because of high toxicity organic chemical pesticides, easy to kill natural enemies and lead Pest resistance, pine resin mixture also because of the lack of raw materials, preparation, use and more cumbersome and easy to produce phytotoxicity restrictions, can not be used in large quantities. After repeated tests in 1986 sprayed lye, due to the base of its own moisture absorption, dew up after the early spray, the amount of more uniform, in the case of low humidity does not form a dew case, sprayed