Japanese oak wilt caused by a fungus
Raffaelea quercivora
Keiko Kuroda, Kobe Univ. JAPAN
Pathogens
Raffaelea quercivora
An ambrosia beetle Platypus quercivorus
(length=ca. 5mm) vectors the pathogenic fungus.
Mycangia of the female beetle
Kuroda, K.: Responses of Quercus sapwood to infection with the pathogenic fungus of a new wilt disease vectored by the ambrosia beetle Platypus quercivorus. J. Wood Science 47: 425-429, 2001
Wilting oak trees during summer (Quercus serrata)
Discoloration of sapwood following the beetle invasion and infection