Analysis of swainsonine; extraction methods, detection, and measurement in populations of locoweeds
(Astragalus lentiginosus) poisoning in cattle and horses.
Conditioning taste aversions to locoweed
(Oxytropis sericea) in horses.
James at the ARS Poisonous Plants Laboratory in Logan, Utah, pinpointed swainsonine as the culprit in locoweed
poisonings about 10 years ago.
Analysis of swainsonine: extraction methods, detection and measurement in populations of locoweeds
It was used to study glucoprotein N-link oligosaccharide as an instrument drug, since it was separated initially from the fruit of Australian Swainsona canescens and North America locoweed
(including Astragalus and Oxytropis spp.) (Li et al., 2004; Douglas et al., 2005; Guetens et al., 2002; William et al., 2001).
On the other hand, while selenium is accumulated by asters, Machaeranthera, Atriplex, Oonopsis and some species of Astragalus (milkvetch), there are some plants which are obligated to accumulate it -- they need it: Stanleya (Princesplume), Xylorrhiza (woody aster) and Astragalus mollissimun (locoweed
Larkspur, like pine needles, locoweed
, lupine, and a host of other plants found in western pastures, contains toxins that can poison unwitting, hungry livestock.
Milkweed, wild cherry, locoweed
, and others should be avoided.
More than 100 species of locoweed
grow in New Mexico.
Plants in this genus are economically significant as a source of gum tragacanth, as indicators of selenium and uranium and as toxic locoweeds
in rangelands (Allen and Allen, 1981).
Plants in this genus are amazingly diverse, some are nourishing and medicinal, some useful as raw materials, and others, such as the locoweeds
, are toxic.