英国的植物学家们发明了一种防治病虫,保护植物的新方法.以英国达勒姆大学为主的研究者们,除了培育抗性品种外,还利用一种细菌来生产生物防治物质.这些细菌与植物密切共生,只在植株有受害危险的刺激下,它们才产生这种防治物质.所产生的防治物质数量少,可自动控制,又与植物紧密接触,所以这种植保方法不仅价廉,而且可以避免象常规农药那样引起的环境污染.防治植物病虫害,尤其对害虫和真菌病害的防治,是农业生产上的大宗开支,据估计,每年要花费 British botanists invented a new method of pest control and plant protection.Darham University-based researchers in addition to cultivate resistant varieties, but also the use of a bacterium to produce biological control substances These germs are closely intergrowth with plants and they produce this control only when they are at risk of being harmed by the plant and produce less of a controlled substance that can be automatically controlled and in close contact with the plant so that this plant protection approach not only Cheap, but also to avoid the pollution caused by conventional pesticides as environmental pollution.Plant pest control, especially pest and fungal disease prevention and control, is a large agricultural production overhead, it is estimated that each year to spend