The toxicity of duncecap larkspur (Delphinium occidentale Wat.) was measured by a mouse bioassay and correlated relative to total alkaloid concentration for 5 samples during one season of plant growth. The concentration coefficient was -0.920 (standard error of estimate = 0.090) when this relationship was described by an exponential equation of the form Y = ab^x, where Y equals the total alkaloid concentration and X equals the LD50 for mice. The values a and b were estimated to be 5.410 and 0.978, respectively. It is predicted that over the entire growing season, toxicity of larkspur measured by mouse bioassay will be better correlated with toxicity to cattle than will be the correlation of relative total alkaloid content and toxicity to cattle. This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020
Scholarly peer-reviewed articles published by the Society for Range Management. Access articles on a rolling-window basis from vol. 1, 1948 up to 5 years from the current year. Formerly Journal of Range Management (JRM). More recent content is available by subscription from SRM.