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用60~(Co)γ射线25—400krad的不同剂量辐照甘著黑斑病菌及带病甘薯(Ipomoeabatatas Lam.)薯块,发现200及400krad剂量的辐照对菌丝体和子囊孢子有一定的抑制作用,对分生孢子、厚垣孢子抑制作用甚微;200krad在20天内基本抑制薯块上病斑的发生和发展,薯块外观良好,接种发病率比对照低75％,病斑平均直径不及对照的五分之一;400krad的抑茵效果更高,但尚不能完全杀死病菌孢子,并对薯块外表有伤害,使其色泽变暗,贮藏后期易产生干腐。本试验表明,200krad剂量的辐照处理对甘著贮藏有实践意义。
Irradiation of black spot pathogen and Ipomoeabatatas Lam. With different dosages of 60-400krad of 60 ~ (Co) γ-rays showed that irradiation at 200 and 400krad had a certain effect on mycelia and ascospores , The inhibitory effect on conidia and chlamydospores was insignificant; 200krad basically inhibited the occurrence and development of disease spots on potato tuber within 20 days. The tuberous appearance was good and the incidence of inoculation was 75% lower than that of control Less than one fifth of the diameter of the control; 400krad inhibitory effect higher, but not yet completely kill the bacteria spores, and the appearance of potato tuberculosis to make it darker, easy to produce dry rot late storage. This experiment shows that irradiation dose of 200krad has practical significance to the storage.