A pharmaceutical composition comprising a compound represented by formula (I) and at least one compound selected from the group consisting of demystistrobin, azoxystrobin, fluoxastrobin, pyraclostrobin, krasicimimethyl, picoxystrobin, triploxystrobin and N-methyl--methoxyimino--[(2,5-dimethylphenoxy) methyl] phenylacetamide, exhibits an excellent controlling effect against plant diseases. The present invention also relates to a plant disease control composition containing at least one QoI compound selected from the group consisting of (Wherein,ROneRepresents a hydrogen atom or a methyl group,R2Represents a methyl group, a difluoromethyl group or a trifluoromethyl group]화학식 I로 표시되는 화합물과, 디목시스트로빈, 아족시스트로빈, 플루옥사스트로빈, 피라클로스트로빈, 크레속심메틸, 피콕시스트로빈, 트리플록시스트로빈 및 N-메틸-α-메톡시이미노-2-〔(2,5-디메틸페녹시)메틸〕페닐아세트아미드로 이루어지는 군 (A)로부터 선택되는 1종 이상의 QoI 화합물을 함유하는 식물 병해 방제 조성물은 식물 병해에 대한 우수한 방제 효과를 나타낸다.<화학식 I>〔식 중,R1은 수소 원자 또는 메틸기를 나타내고,R2 는 메틸기, 디플루오로메틸기 또는 트리플루오로메틸기를 나타냄〕
