我所的洋芋育种工作,是从一九六○年开始的。以前,由于晚疫病和退化严重,我州洋芋产量大幅度下降,播种面积也逐年缩小。针对“疫病”和“退化”,我们曾先后采取过大面积药剂防治,改进栽培管理,从冷凉地区异地引种等措施,虽有一定效果,但都未从根本上解决问题。毛主席教导我们:“唯物辩证法认为外因是变化的条件,内因是变化的根据,外因通过内因而起作用。”我们学习毛主席的哲学著作,总结实践经验,认识到洋芋品种本身抗病性差,是导致染病、退化的“内因”。只有在改变“外因”的同时,在改变“内因”上狠下功夫,才有可能从根本上解决问题。所以,一九六○年以来,我们 My potato breeding work started in 1960. In the past, due to late blight and serious degeneration, potato production in our country dropped drastically and the sown area also decreased year by year. In response to the “epidemic” and “degradation”, we have successively taken measures such as large-scale prevention and control of pesticides, improved cultivation and management, and introduction from different places in cold regions. Although they have achieved some results, they have not fundamentally solved the problem. Chairman Mao taught us: “Materialist dialectics believe that external factors are conditions for change. Internal factors are the basis for change and external factors work through internal factors.” We studied Chairman Mao’s philosophical works and summarized his practical experience. He realized that potato varieties themselves have poor disease resistance, Is caused by disease, degradation of the “internal.” Only when we change “external factors” and make great efforts to change “internal causes” can we fundamentally solve the problem. So, since 1960, we