Research in Plant Disease 2005;11(2):185-192.
Published online December 30, 2005.
보호용 살균제와 ergosterol 생합성 저해 살균제에 대한 고추 탄저병균의 약제 반응
김준태, 이경희, 민지영, 강범관, 노창우, 홍성택, 김흥태
Response of Colletotrichum spp. Causing Red Pepper Anthracnose to Protective and Ergosterol Biosynthesis-inhibiting Fungicides
Joon Tae Kim, Kyeong Hee Lee, Ji Young Min, Beum Kwan Kang, Chang Woo Rho, Seong Taek Hong, Heung Tae Kim
In 1999 and 2002, 130 and 258 isolates of Colletotrichum spp. causing red pepper anthracnose were obtained from infected red pepper fruits, respectively. Their responses to 4 protective and 3 ergosterol biosynthesisinhibiting( EBI) fungicides were investigated by observing their mycelial growth on PDA incorporated with different concentrations of each fungicide. The Colletotrichum isolates obtained in 1999 showed higher EC50 values than those isolated in 2002 against three protective fungicides such as dithianon, chlorothalonil, and propineb, whereas the response was reversed toward other protective fungicide, iminoctadine. On the other hand, the isolates of year 1999 were more resistant against three EBI fungicides such as tebuconazole, hexaconazole, and prochloraz than those of year 2002; the EC50 values of the former were 1.2-4.4 times higher than those of the latter. The responses of the Colletotrichum isolates toward protective and EBI fungicides were fluctuated according to regions, where the infected fruits were collected. On the other hand, the resistance of Colletotrichum isolates to protective fungicides increased during monitoring from July to September. However, their responses towards EBI fungicides were not changed.
Key Words: Anthracnose, Protective fungicide, Colletotrichum sp., EBI fungicide, Fungicide resistant monitoring

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