Antifungal and Antibacterial Activity of 3-Formyl-7, l l-Dimethyl-(2E,6Z,10)-Dodecatrien-1-al in the Mandibular Gland of Lasius filliginosus Latreille

Abstract

An anti-microbial substance in the mandibular gland of L. fuliginosus was identified as 3-formyl-7, ll-dimethyl-(2E,6Z,10)-dodecatrien-1-al. This substance inhibited the germination of spores of plant pathogens such as Colletotrichum lagenarium, Fusarium oxysporum Schlechtendahl,Gibberella fujikuroi Saw. Wr., Pestulotia longiseta, Pyricularia oryzae Cavara, Verticillum dahliae, and of insect pathogens such as Metarhizium anisopliae F126, Beauveria bassiana F18, Paecilomyces fumosoroseus 522, Verticillium lecanii F126. Moreover, it also inhibited the growth of gram positive and gram negative bacteria. Comparison with dendrolasin, farnesal, and farnesol suggested that the structure of the dialdehyde double bond contributes to the antimicrobial activity. © 1995, JAPANESE SOCIETY OF APPLIED ENTOMOLOGY AND ZOOLOGY. All rights reserved.