Distribution details in United States of America
From CABI Disease map 704 (1996): Present, restricted distribution
From NPPO: Present, restricted distribution
With this view, the distribution is given by US as California, Minnesota, North Carolina and Vermont, southeastern and western states.
* Herb. IMI, 1944.
|Canada||Ontario||Present, no details|
|Canada||Manitoba||Absent, pest no longer present|
|Canada||Present, no details|