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- Pfister, J.A.; Stegelmeier, B.L.; Gardner, D.R.; James, L.F.
- Journal of animal science 2003 v.81 no.9 pp. 2285
- Astragalus lentiginosus; cattle; horses; perennial weeds; cows; calves; woodlands; grazing; plant density; swainsonine; toxins; blood serum; animal behavior; Arizona
- ... Spotted locoweed (Astragalus lentiginosus var. diphysus) is a toxic, perennial plant that may, if sufficient precipitation occurs, dominate the herbaceous vegetation of pinyon-juniper woodlands on the Colorado Plateau. Six cow/calf pairs and four horses grazed a 20-ha pasture with dense patches of locoweed in eastern Arizona during spring 1998. Locoweed density was 0.7 plants/m2 in the pasture. Lo ...