开展害虫天敌资源调查,有计划、有目的地保护、利用、繁殖、引进天敌,搞好生物防治,显得非常迫切和十分重要。这是因为:一方面为了解决单纯依靠化学农药带来的一系列弊病,保障人民的健康;另一方面随着我国国际地位的提高,国际经济往来日益频繁,出口农副产品农药残毒不能超过允许的标准等等。同时,我们要在本世纪末基本实现“四 It is very urgent and very important to carry out the investigation of natural enemies of pests, and to plan, purposefully protect, utilize, propagate and introduce natural enemies and do a good job in biological control. This is because, on the one hand, in order to solve a series of ills brought by relying solely on chemical pesticides and ensure the people’s health, on the other hand, with the improvement of our country’s international status, the international economic exchanges have become increasingly frequent. The pesticide residues of agricultural and sideline products exported can not exceed the allowable Standard and so on. At the same time, we will basically achieve “by the end of this century.”