Invasion information |
Range in Japan |
Almost entire mainland of Japan. |
|
Origin |
Continental China |
Date |
The first record in Japan was at Okayama Pref., by observation of gall in 1941, and by collecting specimen in 1944. |
Route |
Accidental: Possibly hitchhiking on chestnut graft or young tree taken by Japanese soldiers stationed in He Bei, eastern China. |
Impact |
Actually: Parasite on native wild chestnut. Damage on agriculture of Japanese chestnut (Castanea crenata). Potentially: The infestation of this species might cause increase of a native parasitic wasp (e.g., Torymus beneficus), and indirectly impact on native cynipid gall wasp. Native organism(s) affected: Castanea crenata. Native community of parasitic and gall wasps. |
Regulation in Japan |
Cynipidae gall wasps are designated as Quarantine Pest (the Plant Protection Law). |
Introduced range in other countries |
South Korea, Italy, southeastern USA. |