据美国《农业研究》报道:锈病是由疣顶单细胞锈菌引发的.这种病菌掠夺叶和茎的水分和养分.锈菌是自然界最高度深化的真菌,是专性寄生菌.有一种锈病流行就能使菜豆产量减产50%～80%.要提高菜豆产量,就必须培育抗锈病的菜豆品种.这是最好的方法.美国农业研究局、7所大学和商业育种者合作培育抗锈病的菜豆品种.他们在研究中发现,自然赋予了少数几种菜豆植株以及相关的植物以遗传基因,使他们知道如何制止锈菌在植株里立足:或者让植 According to the U.S. Agricultural Research Report, the rust is caused by the rusty warts, which plunder the water and nutrients of the leaves and stems, the most highly degenerated fungus in nature and one of the obligate parasites. Rust epidemic can make bean yield reduced 50% to 80% .To increase the yield of bean, we must cultivate rust-resistant bean varieties.This is the best method.American Agricultural Research Institute, seven universities and commercial breeders to cultivate resistance Rusty bean varieties, which they found in their research, naturally gave the few bean plants and their related genes as genes to make them aware of how to stop rust in their plants: