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Musty odor of entomopathogens enhances disease-prevention behaviors in the termite Coptotermes formosanus
Authors:Yanagawa Aya  Fujiwara-Tsujii Nao  Akino Toshiharu  Yoshimura Tsuyoshi  Yanagawa Takashi  Shimizu Susumu
Affiliation:a Research Institute for Sustainable Humanosphere, Kyoto University, Uji 611-0011, Japan
b National Institute of Agrobiological Science, Ohwashi, Tsukuba 305-0851, Japan
c Chemical Ecology Laboratory, Kyoto Institute of Technology, Matsugasaki, Kyoto 606-8585, Japan
d Biostatistics Centre Kurume University, Kurume 830-0011, Japan
e Institute of Biological Control, Graduate School of Bioenvironmental Science, Kyushu University, Fukuoka 812-8581, Japan
Abstract:
Termites often eliminate pathogens directly through mutual grooming, and are thereby prevent infections from entomopathogenic fungi. Our previous study confirmed that the antennae of Coptotermesformosanus sensitively responded to the musty odor of entomopathogenic fungi. However, it is unclear if this odor has any effect on termite behavior. The purpose of this study was to clarify the effects of fungal odor on termite behavior, especially on conidia removal. The musty odor was prepared as an aqueous solution by immersing conidia in distilled water. When untreated termites were mixed with fungal-odor-treated termites at a ratio of 4:1, mutual grooming and attack of treated termites were frequently observed. This indicated that the fungal odor triggered these behavioral responses. While some components of the fungal odor were found in all of the entomopathogenic fungi tested, the odor profiles differed among the isolates.
Keywords:Metarhizium anisopliae   Beauveria brongniartii   Isaria fumosoroseus   SPME   Fungal odor   Coptotermes formosanus Shiraki   Disease-prevention behavior
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