Canadian milk-vetch
General poisoning notes:
Cattle have been
fatally poisoned when fed on rangeland containing Canadian milk-vetch (Astragalus
canadensis). Experiments with sheep indicated that plant material must
contain NO2 at 250 mg/kg of body weight to produce toxic responses
and 275 mg/kg body weight for a lethal dose. In week-old chicks, the LD50
= 2 g of plant ingested (Williams and James 1975).
Nomenclature:
Scientific Name: Astragalus canadensis L.
Vernacular
name(s): Canadian milk-vetch
Scientific family
name: Leguminosae
Vernacular family
name: pea
Geographic Information
Alberta, British
Columbia, Manitoba, Northwest Territories, Ontario, Quebec, Saskatchewan
Toxic parts:
Flowers, leaves
Toxic plant chemicals:
3-nitropropionic
acid
Animals/Human Poisoning:
Note: When an
animal is listed without additional information, the literature (as of 1993)
contained no detailed explanation.
Cattle
General symptoms of
poisoning:
Death.
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