由于长期使用化学农药防治烟草害虫带来的种种弊病,研究烟草害虫天敌的发生动态和保护利用问题,为开展综合防治提供科学依据,是当前烟草害虫防治中迫切需要解决的问题.作者根据近几年的调查,提出一些粗浅看法,供讨论、参考.一、河南烟草主要害虫天敌河南烟草主要害虫是烟蚜、烟青虫及细毛蝽.烟蚜从烟草移栽后即开始发生,自六月中旬后进入猖獗发生危害期.烟青虫从五月底至六月上中旬的第一代和七月上中旬的第二代幼虫为害春烟最重,第三代幼虫发生 Due to the long-term use of chemical pesticides to prevent tobacco pests brought about by the shortcomings of the study of tobacco pests natural enemies of the occurrence and protection of the use of the problem, to provide a scientific basis for comprehensive prevention and control is currently an urgent need to solve the tobacco pest control problems.According to the recent Years of investigation, put forward some superficial views for discussion and reference.First, the main pests of Henan tobacco major pests Henan tobacco main pests are aphids, tobacco budworm and nail bugs.Yellow aphids immediately after the transplanting began to occur from mid-June After the rampant into the hazardous period.Rapeworm from the end of May to mid-June on the first generation and mid-July on the second generation of larvae most damaging spring smoke, the third generation larvae occurred