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每年由丝核菌(R.solani)引起的根腐和冠腐病,对糖甜菜产量损失极大,由蛇眼病菌(P.betae)和灰霉菌(B.cinerea)引起的贮藏腐烂病(窖腐)大大降低甜菜含糖1％～2％。预防和控制上述3种病害的措施包括农业栽培实践,如轮作、起垄等,但遗传抗病育种为最有效。美国的克罗拉多州和北达科他州的研究人员已分别培育出了一些对上述3种病害有特殊抗性的品系和品种。本试验通过接种对若干抗病品系进行3种病害综合抗性的评价。将3种病原菌分别分离、培养,以备接种用。
Annual root rot and crown rot caused by R. solani have a very large loss of yield on sugar beet and the storage of rot caused by P.betae and B. cinerea Pit corrosion) greatly reduce sugar beet 1% to 2%. Measures to prevent and control these three diseases include agricultural cultivation practices such as crop rotation and ridge ridging, but genetic resistance breeding is the most effective. Researchers in the United States of Colorado and North Dakota have developed several lines and breeds that are resistant to the three diseases listed above. In this experiment, we evaluated the integrated resistance of three disease-resistant strains by inoculation. The three kinds of pathogens were isolated and cultured for use inoculation.