Location: Poisonous Plant ResearchTitle: Age-dependent intoxication by larkspur (Delphinium) in Angus steers
Submitted to: Toxicon
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 7/22/2018
Publication Date: 7/28/2018
Citation: Green, B.T., Gardner, D.R., Cook, D., Pfister, J.A., Welch, K.D., Keele, J.W. 2018. Age-dependent intoxication by larkspur (Delphinium) in Angus steers. Toxicon. 152:57-59. https://doi.org/10.1016/j.toxicon.2018.07.020.
Interpretive Summary: Do not graze yearling Angus steers on larkspur-infested rangelands. They will die. Instead, graze two year old or older animals on larkspur-ingested rangelands to reduce larkspur poisonings.
Technical Abstract: The effect of age on larkspur poisoning of cattle is unknown. An experiment consisting of oral dosing of dried ground Delphinium barbeyi to ten Angus steers as yearlings, and again at two years was performed. There were significant difference between the responses of yearling and two year old steers (P = 0.0015), with yearling steers being more susceptible. These results suggest that the Angus steer response to larkspur is age-dependent.