| 다양한 작물로부터 분리한 탄저병균(Colletotrichum spp.)의살균제에 대한 반응 |
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김준태, 민지영, 김흥태 |
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| Response to Fungicides of Colletotrichum Species Isolated from Infected Tissues of Several Crops |
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Joon Tae Kim, Ji Young Min, Heung Tae Kim |
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| Abstract |
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This study has been conducted to investigate the responses of various isolates of four Colletotrichum species such as C. gloeosporioides, C. acutatum, C. coccodes, and C. dematium isolated from infected tissues of several crops to fungicides such as carbendazim, carbendazim+diethofencarb, four protective fungicides, and three ergosterol biosynthesis-inhibiting (EBI) fungicides. All the isolates of C. acutatum showed EC50 values in a range of 0.001-3.040 μg/ml against carbandazim, a benzimidazole fungicide. As for the response to carbendazim, the isolates of C. gloeosporioides obtained from pepper, apple, and strawberry were clearly divided into two groups, resistant or sensitive isolates. All the resistant isolates showed EC50 values above 1000 μg/ml, whereas the sensitive isolates had lower EC50 values than 0.550 μg/ml. The isolates of C. gloeosporioides exhibited a negative cross resistance between carbendazim and diethofencarb (a N-phenylcarbamate fungicide), but isolates of C. acutatum did not. Toward carbendazim, C. coccodes and C. dematium isolates showed a similar response to C. acutatum isolates and the sensitive isolates of C. gloeosporioides, respectively. As for response of protective fungicides, all the isolates of C. acutatum showed a more resistant reaction than all the isolates of C. gloeosporioides. However, there was no difference among 4 species of Colletotrichum against EBI fungicides. |
| Key Words:
Benzimidazole, .Colletotrichum, Ergosterol biosynthesis-inhibiting fungicide, Fungicidal reaction, Protective fungicide |
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