Anti fungal effect of mite alarm pheromone citral 2. anti fungal effect of the hexane extracts of the grain mites and some analogs of citral

Okamoto, M.; Matsumoto, K.; Wada, Y.; Kuwahara, Y.

Medical Entomology and Zoology 32(4): 265-270


Accession: 004757487

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The antifungal effect of the following 3 groups of volatile materials on Aspergillus fumigatus were investigated by the modified gas method (Okamoto et al., 1978). First, hexane extracts of 5 spp. of the grain mites i.e., Carpoglyphus lactis, Lardoglyphus konoi, Aleuroglyphus ovatus, Tyrophagus putrescentiae and Dermatophagoides farinae produced 4 analogs of citral i.e., geraniol, nerol, neryl formate and citronellal. Then some volatile alkanes and alkenes were identified from T. putrescentiae by GLC, i.e., tridecane, tetradecane, pentadecane, tridecene, tetradecene and pentadecene. Thirdly, the hexane extracts of 4 spp. of the grain mites and T. putrescentiae inhibited the growth of A. fumigatus. The antifungal effects of hexane extracts of C. lactis and L. konoi were probably due to citral, but those of D. farinae and A. ovatus might be affected by other volatile substances. All analogs of citral were less effective than citral.