[MAIPC] USDA APHIS considers Ficaria verna to be a high risk weed which could spread across 79 percent of the United States, anticipating possible impacts to threatened and endangered riparian species.[9]

[René FH Sforza]

Hi Marc,

I could not find the PDF of this short article on this fungus. But I guess it was collected from Ukraine. It seems widespread in Europe:

https://bladmineerders.nl/parasites/fungi/basidiomycota/pucciniomycotina/pucciniales/pucciniaceae/uromyces/uromyces-ficariae/

As I said, there is probably a bunch of natural enemies on fig butternut, but no one has paid attention before (except for this fungus). For now, our unit (EBCL) cannot work on pathogens for any kind of weed project, but things may change in the future.

René



> Le 5 déc. 2021 à 01:53, Marc Imlay <ialm at erols.com> a écrit :
> 
> Plant pathogens that have been identified on lesser celandine include the host-specific fungal rustUromyces ficariae (Schumach) Lev. (Minter and Tykhonenko 2002); downy mildew (Peronospora ficariae Tul.) (Hall 1998); fungal leaf spot (Entyloma ficariae Thüm.
> Author: Annie E. Axtell, Antonio DiTommaso, Angela R. Post
> Cited by: 13
> Publish Year: 2010
> Lesser Celandine (Ranunculus ficaria): A Threat to ...
> <image001.png>
> bioone.org/journals/invasive-plant-science-and-management/volume-3/issue-2/I…
>  
> Ficaria verna, (formerly Ranunculus ficaria L.) commonly known as lesser celandine or pilewort,[3] is a low-growing, hairless perennial flowering plant in the buttercup family Ranunculaceae native to Europe and west Asia. It has fleshy dark green, heart-shaped leaves and distinctive flowers with bright yellow, glossy petals.[4][5] It is now introduced in North America, where it is known by the common name fig buttercup and considered an invasive species.[6][7][8][9] The plant is poisonous if ingested raw and potentially fatal to grazing animals and livestock such as horses, cattle, and sheep.[1
> From: Marc Imlay <ialm at erols.com> 
> Sent: Saturday, December 04, 2021 4:30 PM
> To: 'INVASIVES at LISTSERV.UMD.EDU' <INVASIVES at LISTSERV.UMD.EDU>
> Cc: 'rsforza at ars-ebcl.org' <rsforza at ars-ebcl.org>
> Subject: FW: USDA scientists have discovered a promising biological control agent for the invasive plant, Tree-of-Heaven (Ailanthus altissima)
>  
> From Wikipedia, the free encyclopedia
>         Thank you René and your team in France for doing this great research. 
>  
> From: Rod Simmons <simmons22041 at gmail.com> 
> Sent: Friday, December 03, 2021 9:53 PM
> To: Marc Imlay <ialm at erols.com>
> Cc: Marc Imlay <marc.imlay at mdsierra.org>; Laurel Imlay <laurel.imlay at mdsierra.org>; Jil Swearingen <jilswearingen at gmail.com>; Judy Fulton <jfulton5 at gmail.com>
> Subject: USDA scientists have discovered a promising biological control agent for the invasive plant, Tree-of-Heaven (Ailanthus altissima)
>  
> Currently on the Capital Naturalist Facebook page:
>  
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