コナダニ類の alarm pheromone Citral の抗カビ作用の研究 : 3. 種々のカビに対する citral の作用

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In this study we investigated the antifungal effect of gaseous citral on various fungi by "the modified gas method". The 22 species of fungi were used in this experiment (Table 1). Many of them are often observed in these stored products and some of them are pathogenic to men and animals. The concentrations of citral hexane solution were 1,5,10 and 20mg/ml and 0.05ml of them was impregnated in a paper disc. The cultures were incubated at 28℃ and the radial growth was measured every 24hr for 4 or 5 days. The growth inhibitory rate of citral to various fungi was calculated from the square measure of the colony after 72hr of incubation and was shown in Fig. 2. In Trichoderma sp. the inhibitory activity of citral at each concentration was observed after 48hr incubation, but after 72hr only 20mg/ml of citral hexane solution inhibited the radial growth of fungi compared with that of control. And in Rhizopus nigricans, which grew most rapidly in the 22 species of fungi, the antifungal effect of citral was observed after 24hr incubation, but it could not be observed at all after 48hr. Because the mycelium of that fungi expanded too quickly and covered all the medium even with 20mg/ml of citral. Though the antifungal activity of citral is different by the species of the fungi, it is obvious that the gaseous citral has antifungal effect on all the 22 different species of fungi investigated. So it is supposed that, in the environment of the grain mites, citral released by the mite inhibits the growth of fungi and is indispensable to the survival of mites.
日本衛生動物学会の論文
1982-03-15

コナダニ類の alarm pheromone Citral の抗カビ作用の研究 : 3. 種々のカビに対する citral の作用

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