九十年代以来 ,随着水稻肥床旱育秧技术的应用和高产优质水稻新品种的推广 ,水稻恶苗病呈快速上升趋势 ,已成为水稻的主要病害之一 ,田间发病率可达 10 %～ 2 0 % ,水稻干尖线虫病的发生仍比较普遍。我们新研制出的恶线清对水稻恶苗病和干尖线虫病的防治效果均在 90 %以上 ,使 Since the nineties, with the application of rice seedling dry-cultivation techniques and popularization of new rice varieties with high yield and good quality, the emergence of rice bad-smelling disease has been rapidly increasing and has become one of the major diseases of rice. The incidence rate in the field can reach 10% 20%, the occurrence of rice tip nematode disease is still relatively common. Our newly developed evil line on the prevention and treatment of rice Bakanae disease and dried-tip nematodes were more than 90%, so that