1994 年 1994 巻 41 号 p. 97-99
Decreased sensitivity in Sphaerotheca fuliginea to DMIs was found in most of the cucumber fields investigated in Nagano Prefecture. The degree of resistance to triadimefon and fenarimol was rather high, and many isolates were more than 100 times less sensitive compared with the reference sensitive strain. A reduced number of DMI applications marginally increased sensitivity.