加拿大的渥太略是菜干豆的主产区,1976年暴发菜豆炭疽病,干豆发病率高达18％,严重影响了产量、质量和售价。采取防治措施后.病情减轻,1981年发病率降为零。1985年菜豆面积44000公顷,生产干豆66000吨,其中75％出口。均价每吨650美元,仅此一项收益就为4300万美元。主要措施是:(1)严格检查种子谱系和抗性。过去只重视细菌性疫病,是造成炭疽病流行的重要原因;(2)全部种子都要进行种 Ottawa, Canada, is the main producing area for dried beans. In 1976, bean anthracnose broke out and the incidence of dry beans was as high as 18%, seriously affecting production, quality and selling prices. After taking prevention and treatment measures to reduce the severity of morbidity in 1981 dropped to zero. In 1985 the bean area of ​​44000 hectares, 66000 tons of dried beans, of which 75% of exports. The average price of 650 US dollars per ton, the only one gain of 43 million US dollars. The main measures are: (1) Strict examination of seed pedigree and resistance. The past emphasis on bacterial diseases is an important cause of anthrax epidemic; (2) all seeds must be planted