线虫动物门Nemata斯氏线虫科Steinernematidae中的新线虫属Neoaplectana、斯氏线虫属Steinernema和异小杆科Heterorhabditidae的异小杆线虫属Heterorhabditis都可使昆虫致病,是病原线虫中最有希望的生物防治因子之一。这类线虫具有广泛的寄主范围,仅DD—136这个品系,寄主昆虫就超过一千种(Nickle 1980);它们有较高的毒性,能在24～48小时内使昆虫致死;它们在土壤内有较好的生存和扩散能力,尤其近 Nematodes nematode Nemata spp. Steinernematidae nematodes Neoaplectana, Steinernema spp. And Heterorhabditidae heterotrichina heterotrichinae Heterorhabditis can make insects pathogenic, is the most promising pathogenic nematode organism One of the prevention and treatment factors. These nematodes have a wide range of host ranges. Only DD-136 has more than 1,000 host insects (Nickle 1980); they are highly toxic and can kill insects within 24 to 48 hours; they are in the soil Have a better ability to survive and proliferate, especially near