國內 사과産地 4個處에서 푸른곰팡이 病菌 Penicillium expansum을 分離하여 各種 殺菌劑에 대한 反應을 調査하였다. 一般的으로 菌의 藥劑耐性은 地域間에 差異가 적었으며 藥劑의 種類 및 濃度에 의한 差異는 컸고 봄菌株가 자랄 수 없는 高濃度에서도 가을菌株는 生長하였다. 菌?生長에 대한 殺菌劑의 ED?? 및 MlC는 ; benomyl, garbenda, polydong, polyoxin, thiophanate methyl 이 0.1㎍~41.7㎍/㎖ 및 100㎍~2,250㎍/㎖ 로서 貯藏庫 및 果樹園에서 分離한 菌의 抑制效果가 높고 菌의 耐性이 낮았으며, captafol, captan, iprodione, mancozeb 이 2.6㎍~750㎍/㎖ 및 638㎍~40,500㎍/㎖로서 藥效 및 菌의 耐性이 中度였고, chlorothalonil, folpet, oxidong, propineb, triademefon 이 27.8㎍~8,354㎍/㎖ 및 2,625㎍~150,357㎍/㎖로서 效果가 낮고 菌의 耐性이 높았다. 胞子形成 抑制效果는 菌?生長 抑制效果와 같은 傾向을 보였으며 胞子發芽 抑制效果는 ployoxin 및 triademefon을 除外하고는 反對의 傾向을 보였다.
Responses to the 14 fungicides added in PSA of Penicillium expansum isolated froms the four major apple growing areas in Korea were examined. Degrees of the fungal tolerance were various with little difference by area and with great difference by kind and concentration of fungicide. Fall isolates of the fungus grew at higher fungicide concentration than did the spring isolates. ED?? and MIC to mycelial growth of benomyl, garbenda, polydong, polyoxin and thiophanate methyl were 0.1㎍ - 41.7㎍/㎖ and 100㎍ - 2,250㎍/㎖, respectively, indicating high fungicide effects on the fungus isolated from decayed apples in storages and infected apples in orchards with low fungal tolerance; of captafol, captan, iprodione and mancozeb were 2.6㎍ - 750㎍/㎖ and 638㎍ - 40,500㎍/㎖, respectively, indicating medium degree of both fungicidal effects and fungal tolerance; and of chlorothalonil, folpet, oxidong, propineb and triademefon were 27.8㎍ - 8,354㎍/㎖ and 2,625㎍ - 150,357㎍/㎖, respectively, indicating low fungicide effects and high fungal tolerance. Fungicidal inhibitory effects on conidia formation exhibited a similar trend as on mycelial growth whereas those on conidia germination showed an opposite trend to the mycelial growth with the exception of polyoxin and triademefon.