Monitoring for the Resistance of Botrytis cinerea Causing Gray Mold Against Mepanipyrim

With 86 isolates of Botrytis cinerea obtained from diseased fruits of tomato, strawberry and cucumber, it was conducted to detect the fungicide resistance of B. cinerea against mepanipyrim through an agar dilution method.FGA medium was used for monitoring the resistance.Among 86 isolates of B. cinerea, resistant isolates were composed by 23.3%, which was different according to regions isolating the pathogen.In accordance with isolation region, the isolation frequency of resistant isolates was as follows; that of Gyeonggi, Gyeongnam/Pusan and chungnam was 28.6%, 33.3% and 12.8%, respectively.The resistant isolates of B. cinerea showed the cross resistance between mepanipyrim and pyrimethanil.Also the pathogenicity of B. cinerea resistant to mepanipyrim was high as like that of sensitive isolates.Because of them, it should be necessary to manage the spraying system of mepanipyrim and the monitoring for the fungicide resistance.Key words Botrytis cinerea, fungicide resistance, mepanipyrim, cross resistance 서 언 Botrytis cinerea는 150여종의 작물을 기주로 가지는 대표 적인 다범성 식물병원균으로 알려져 있다(Agrios, 2005).잿 빛곰팡이병균은 시설 원예작물, 화훼, 과수 및 저장과 수송 중에도 병을 일으켜 큰 손실을 초래한다.부생성이 강하여 노화된 식물체나 죽은 식물체 잔재물 등에서 균사조각, 균 핵, 분생포자 또는 자낭포자의 형태로 월동을 하며,