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消灭杂草,战胜草害,一直是农牧业生产上的一个重要问题。牧场草原的杂草为害更为严重。利用昆虫除草,在国际上还是一门新兴的研究领域。美国从五十年代以来开始对牧业杂草的生防引起重视,杂草生防科研项目显著增加,并已取得重大科研成果。例如为害草场的克拉马思草(Klamath Weed)又名黑点叶金丝桃Hypericum Perforatum是一种对牲畜有毒的杂草;曾为害美国西部1,800多万亩草场,对畜牧业发展
Eliminating weeds and defeating grass and weeds has always been an important issue in the production of agriculture and animal husbandry. Grassland weeds damage more serious. The use of insects weeding in the international community is still a new field of research. Since the 1950s, the United States has paid great attention to the biocontrol of animal husbandry and weeds. The scientific research project on weeds and biological control has significantly increased and major scientific achievements have been made. For example, grassland damage Klamath Weed, also known as black spots Hypericum Perforatum is a poisonous weed to livestock; had damage to more than 1,800 acres of pastures in the western United States, the development of animal husbandry