the EC 5 0 of IBP to resistant isolates (Mudanjiang region) averaged at 30mg/kg, 2 times as much as that to sensitive ones.

• 说明牡丹江地区的稻瘟病菌对三环唑已产生一定的抗性，其抑制中浓度大约是哈尔滨地区的2倍。