1986、87两年分别采用上一年无病种薯28个品种/系各3块,取中部切决于切面上蘸接近等量和等浓度的黑疤病(Ceratocystis fimbriata)孢子悬液,恒温、恒湿培养,定期取样作侵染区组织徒手切片、乳酚油封片用BHZ型0lympus荧光显微镜(B+G滤镜激发)观察,取得以下资料; In 1986 and 1987, 28 varieties and 3 lines of disease-free seed potato were used in the past two years respectively. The middle part was dipped in nearly equal and equal concentration of Ceratocystis fimbriata spore suspension, , Constant humidity culture, regular sampling for the infected area tissue sections, latex pieces were observed with BHZ 0 Olympus fluorescence microscope (B + G filter excitation observation), to obtain the following information;