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水稻害虫是我省晚稻生产上的一大敌害,为了确保晚稻丰产丰收,目前,在化学防治上,常根据田间害虫发生情况,采用适时使用化学药剂进行防治的方法。采用这个办法,每季晚稻本田通常需施药3—4次。由于施药次数多、药量大,所花成本高、劳力多,这不仅加重农民负担,而且常因喷洒农药而大量杀伤害虫天敌,甚至造成农药对环境和谷物的污染等不良后果。因此,选择适宜农药品种,改进施药方法,提高药剂防治效果,延长药剂残效期,
Rice pests are a major enemy of late rice production in our province. In order to ensure high yield and good harvest of late rice, chemical pesticides are often used to prevent and control chemical pests on the basis of field pests. Using this approach, Honda rice every quarter usually need to spray 3-4 times. Due to the large number of pesticides applied, large quantities of drugs, high costs and labor costs, this not only aggravates the peasants’ burden, but also often causes large quantities of pests and natural enemies by spraying pesticides and even causes adverse consequences such as pollution of the environment and grains by pesticides. Therefore, the choice of suitable varieties of pesticides, pesticide application methods to improve the effectiveness of the agent to prevent and control, to extend the residual period,