Noxious Weeds Profile - European Buckthorn
Table of Contents
English - European buckthorn
French - nerprun cathartique, épine noire, nerprun puratif
Latin - Rhamnus cathartica L.
Ontario Weeds Act - noxious
Other provinces - noxious in Manitoba
Canadian Federal Seeds Act - no
U.S. Federal Noxious Weed - no
U.S. Noxious State Reg - Iowa
Pub 505 - Alternate host for the fungus which causes leaf and crown rust of oats.
NE Weeds - not included
Canadian Poison Plant - The bark and fruits contain chemicals that have a strong purgative action that can affect humans. Severe poisoning is rare (Cooper and Johnson 1984, Lampe and McCann 1986).
Cornell Poison Plant - not listed
- Introduced as an ornamental shrub. Seeds are widely scattered by birds. Common in fence rows, pastures, woodland and abandoned areas.
Method of Propagation
- New shoots readily grow from cut stumps. Cut and chemically treat stumps in autumn. Control is labour intensive. Tops are usually cut off manually and then stumps treated with a basal bark or stump herbicide treatment. Mowing or spraying of small plants can be successful to maintain control.
- Alder buckthorn is part of the same genus but is not an important
host of the oat rust fungus. Crown rust continues to be a significant
disease of oats with various races and the ability to mutate and
make genetic advances short term successes. Single gene resistance
is generally not effective. New gene stacking techniques and newer
cultivar show some promise. Oat acreage is on the decline in Ontario
for a variety of reasons. European buckthorn is very plentiful
in all oat growing areas. Spores can travel for miles. Eradication
programs of the 70's have had only marginal long term success.
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