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Oak Ambrosia Beetle

Platypus quercivorus (Murayama)
Oak Ambrosia beetle



The oak ambrosia beetle has a wide host range. It attacks many species of the family Fagaceae but is also known to attack trees from other families. reported hosts include: Chinese holly, Japanese chicquapin, Japanese tanbark oak, Japanese evergreen oak, sawtooth oak, ichiigashi, Japanese blue oak, Mongolian oak, ubamegashi, urazirogashi, konava, tsukabanegashi, spice bush, Prunus sp. and Japanese cedar.


Commodities Affected:
Forestry and Natural Areas, Nursery, Ornamentals, and Turf



Oaks, the primary host plants of the oak ambrosia beetle, are commercially important for lumber and products such as furniture, cabinets, flooring and cooperage. In addition oaks are important ornamental and street trees in many North American communities. The Platypus quericivorus/Raffaelea quercivora complex could cause significant loss of wood quality. Moreover, if the fungus R. quercivora is pathogenic to North American oaks or other Fagaceae, it could cause extensive tree mortality. Movement of oak products could be adversely affected by quarantines designed to reduce the spread of infestations. Oak mortality in North American forests could lead to significant ecosystem disruption and loss of biodiversity. Many wildlife species are dependent on acorns produced by oaks for a food source. Therefore, a loss of the oak component of forests could result in adverse effects on many wildlife species.



The oak ambrosia beetle is not known to occur in Indiana.