杂草的生物防治,在我国历史悠久。古代就在稻田放鸭群、草鱼等灭草,并在一些水面培植草绿萍,以草克草,但这些方法至今还没有实际应用。世界各国,对杂草生物防治的研究工作,近十年来才有很快的发展,目前世界各地报道,用生物防治成功的已有30多种杂草。在美国和加拿大约有80种杂草作为生物防治对象。 Biological weed control, has a long history in our country. In ancient times, duck flocks and grass carp were released in the paddy fields. Grass fodder was cultivated on some water surfaces, but the methods were not yet practically used. In all countries in the world, the research on the biological control of weeds has witnessed rapid development over the past decade. Currently, more than 30 kinds of weeds have been successfully used for biological control in various parts of the world. About 80 weed species are used as biological control in the United States and Canada.