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1988～1990年田间稻瘟病菌抗药性测定表明,四川11盆地稻瘟病菌存在有抗异稻瘟净(IBP)和稻瘟灵(IPT)的菌株.抗IBP菌株的IBP抑制中浓度(EC_(50))平均为37.30μg/ml,为敏感菌株的2.1倍.抗IPT菌株D69-4的15μg/ml IPT的抑菌率为55.41%.抗IPT菌株出现频率显著低于抗IBP菌株.抗IBP突变频率为22.96%,而抗IPT突变频率为3.80%.抗药性菌株的地理分布地区间无显著差异;抗性菌株的菌丝生长速率、产孢量及致病性与敏感菌株无显著差异.
The antibiotic resistance of Magnaporthe grisea from 1988 to 1990 showed that there were isolates of IBP and IPT in Magnaporthe grisea in Sichuan 11. The IBP inhibitory concentration (EC_ 50) was an average of 37.30μg / ml, 2.1 times that of the susceptible strain.Antibacterial rate of anti-IPT strain D69-4 was 55.41% at 15μg / ml IPT.The frequency of anti-IPT strains was significantly lower than that of anti-IBP strains. The frequency of mutation was 22.96% and the frequency of anti-IPT mutation was 3.80%. There was no significant difference in the geographical distribution of drug-resistant strains. The mycelial growth rate, sporulation and pathogenicity of the resistant strains were not significantly different from those of the susceptible strains.