柠檬果实营养丰富,除鲜食外,主要作香料、医药及食品工业的原料。四川省、重庆市是全国柠檬的主要产区,产品占全国总产量的90%左右。但近些年来流胶病危害严重,发病率轻者达30%左右、重者达90%以上,死树率这4%左右,严重地威胁着四川省、重庆市柠檬生产的发展。流胶病主要危害柠檬树的主干和主枝,幼苗及成年结果树均会受害。病菌从伤口 Lemon fruit is rich in nutrition, except fresh food, mainly for spices, medicine and food industry raw materials. Sichuan Province and Chongqing Municipality are the major producing areas of lemon in the country, accounting for about 90% of the total output of the country. However, in recent years, the serious problem of melogenic disease is that the morbidity is about 30%, the serious one is more than 90% and the dead tree is about 4%, which seriously threatens the development of lemon production in Sichuan and Chongqing. Myrosinosis is the major hazard to the trunk and main branches of lemon trees, and both the seedlings and adult tree will suffer. Germs from the wound