Growth rate method was used to test resistance to isoprothiolane (IPT) in 146 isolates of Mag napothe grisea, from more than 200 disease samples of 20 counties in Guizhou province.

• 对来自贵州省20个县(市)200余份稻瘟病标样上的146个单孢菌株采用生长速率法测定了稻瘟病菌对稻瘟灵的抗药性。