ANTIFUNGAL AND ANTIBACTERIAL ACTIVITY OF 3-FORMYL-7,11-DIMETHYL-(2E,6Z,10)-DODECATRIEN-1-AL IN THE MANDIBULAR GLAND OF LASIUS-FULIGINOSUS LATREILLE

An anti-microbial substance in tile mandibular gland of L. fuliginosus was identified as 3-formyl-7,11- dimerhyl-(2E,6Z,10)-dodecarrien-1-al . This substance inhibited the germination of spores of plant pathogen s such as Colletotrichum lagenarium, Fusarium oxysporum SCHLECHTENDAHL , Gibberella fujikuroi SAW. WR., Pestulotia longiseta, Pyricularia ory zae CAVARA, Verticillum dahliae, and of insect pathogens such as Metar hizium anisopliae F126, Beaweria bassiana F18, Paecilomyces fumosorose us 522: Verticillium lecanii F126. Moreover, it also inhibited the gro wth of gram positive and gram negative bacteria. Comparison with dendr olasin, farnesal, and farnesol suggested that the structure of the dia ldehyde double bond contributes to the antimicrobial activity.