本文企图对加拿大生物防治工作目前的水平及其成就作一个全面的总结,而把重点放在已经成功的例子方面(即已被造林、农场工作者所采用的例子)。它们不论在理论上或实际中都是近三年来最有成效的例子。根据“生物防治”的含义是应用天敌,例如扑食性昆虫,寄生性昆虫和病菌来消灭害虫。“保存”则意味着保存当地原有的天敌。“控制”则包含着计划引进的天敌。控制可以用“接种释放(inoculation)”的方法—即被引进的天敌一旦进入这个生态环境后会达到这样一个密度,即它们可以持久地控制住这种害虫的数量,或另一种方法—“大量释放(inundati- This article attempts to give a comprehensive summary of the current state of conservation efforts in Canada and their achievements, with a focus on the examples that have been successful (ie examples already taken by afforestation and farm workers). They are the most productive examples in nearly three years, both in theory and in reality. According to “biological control” means the use of natural enemies, such as prey insects, parasitic insects and germs to eliminate pests. “Save” means to save the original natural enemy. “Control” contains the natural enemies planned to be introduced. Control can be “inoculation” -that is, once the introduced natural enemies enter the ecosystem, they reach a density that they can permanently control the number of such pests, or another way- " Inundati-