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M. Ralphs · SciRah

Researcher profile · Semantic Scholar

M. Ralphs

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M. Ralphs — researcher profile on SciRah

h-index: 35
Works: 210
Citations: 4,286

Most-cited papers

Analysis of swainsonine: extraction methods, detection, and measurement in populations of locoweeds (Oxytropis spp.).
Dale R. Gardner, R. Molyneux, M. Ralphs
2001Journal of Agricultural and Food Chemistry136 citations
Semantic Scholar
Relationship Between the Endophyte Embellisia spp. and the Toxic Alkaloid Swainsonine in Major Locoweed Species (Astragalus and Oxytropis)
M. Ralphs, R. Creamer, D. Baucom, D. Gardner +5 more
2007Journal of Chemical Ecology104 citations
Semantic Scholar
Locoweed Poisoning in Livestock
D. Cook, M. Ralphs, K. Welch, B. Stegelmeier
200999 citations Open access
Semantic Scholar
Swainsoninine Concentrations and Endophyte Amounts of Undifilum oxytropis in Different Plant Parts of Oxytropis sericea
D. Cook, D. Gardner, M. Ralphs, J. Pfister +2 more
2009Journal of Chemical Ecology68 citations
Semantic Scholar
Swainsonine and endophyte relationships in Astragalus mollissimus and Astragalus lentiginosus.
D. Cook, D. Gardner, Daniel S. Grum, J. Pfister +3 more
2011Journal of Agricultural and Food Chemistry57 citations
Semantic Scholar
Larkspur poisoning: toxicology and alkaloid structure-activity relationships
K. Panter, G. D. Manners, B. Stegelmeier, Stephen T. Lee +4 more
200248 citations
Semantic Scholar
Management of three toxic Delphinium species based on alkaloid concentrations
J. Pfister, M. Ralphs, D. Gardner, B. Stegelmeier +3 more
200247 citations
Semantic Scholar
Lupine induced "crooked calf disease" in Washington and Oregon: identification of the alkaloid profiles in Lupinus sulfureus, Lupinus leucophyllus, and Lupinus sericeus.
Stephen T. Lee, D. Cook, K. Panter, D. Gardner +4 more
2007Journal of Agricultural and Food Chemistry44 citations
Semantic Scholar
Conditioning taste aversions to locoweed (Oxytropis sericea) in horses.
J. Pfister, B. Stegelmeier, C. D. Cheney, M. Ralphs +1 more
2002Journal of Animal Science41 citations
Semantic Scholar
Transmission of the locoweed endophyte to the next generation of plants
M. Ralphs, D. Cook, D. Gardner, Daniel S. Grum
201137 citations
Semantic Scholar
Taxonomic implications of diterpene alkaloids in three toxic tall larkspur species (Delphinium spp.)
Dale R. Gardner, M. Ralphs, D. Turner, S. L. Welsh
200235 citations
Semantic Scholar
Cattle prefer endophyte-free robust needlegrass.
T. Jones, M. Ralphs, D. Gardner, N. Chatterton
200035 citations Open access
Semantic Scholar
Influence of Phenological Stage on Swainsonine and Endophyte Concentrations in Oxytropis sericea
D. Cook, Lei Shi, D. Gardner, J. Pfister +3 more
2012Journal of Chemical Ecology34 citations
Semantic Scholar
White locoweed toxicity is facilitated by a fungal endophyte and nitrogen-fixing bacteria.
José R. Valdez Barillas, M. W. Paschke, M. Ralphs, R. Child
2007Ecology34 citations
Semantic Scholar
Influence of Light and Photosynthesis on Alkaloid Concentration in Larkspur
M. Ralphs, G. D. Manners, Dale R. Gardner
2004Journal of Chemical Ecology32 citations
Semantic Scholar
Predicting Toxicity of Tall Larkspur (Delphinium barbeyi): Measurement of the Variation in Alkaloid Concentration Among Plants and Among Years
M. Ralphs, Dale R. Gardner, D. Turner, J. Pfister +1 more
2002Journal of Chemical Ecology32 citations
Semantic Scholar
Influence of seed endophyte amounts on swainsonine concentrations in Astragalus and Oxytropis locoweeds.
Daniel S. Grum, D. Cook, D. Gardner, J. M. Roper +2 more
2012Journal of Agricultural and Food Chemistry30 citations
Semantic Scholar
Quantitative PCR method to measure the fungal endophyte in locoweeds.
D. Cook, D. Gardner, K. Welch, J. M. Roper +2 more
2009Journal of Agricultural and Food Chemistry30 citations
Semantic Scholar
Distribution of Locoweed Toxin Swainsonine in Populations of Oxytropis lambertii
M. Ralphs, S. L. Welsh, Dale R. Gardner
2002Journal of Chemical Ecology26 citations
Semantic Scholar
Invasion of Broom Snakeweed (Gutierrezia sarothrae) Following Disturbance: Evaluating Change in a State-and-Transition Model
E. Thacker, M. Ralphs, C. Call, B. Benson +1 more
200825 citations Open access
Semantic Scholar
Alkaloid Profiles, Concentration, and Pools in Velvet Lupine (Lupinus leucophyllus) Over the Growing Season
Stephen T. Lee, M. Ralphs, K. Panter, D. Cook +1 more
2006Journal of Chemical Ecology25 citations
Semantic Scholar
Locoweed (Oxytropis sericea)—induced Lesions in Mule Deer (Odocoileius hemionus)
B. Stegelmeier, L. James, D. Gardner, K. Panter +4 more
2005Veterinary Pathology-Supplement24 citations
Semantic Scholar
A Functional Explanation for Patterns of Norditerpenoid Alkaloid Levels in Tall Larkspur (Delphinium barbeyi)
M. Ralphs, Dale R. Gardner, J. Pfister
2000Journal of Chemical Ecology24 citations
Semantic Scholar
Distribution of Norditerpene Alkaloids in Tall Larkspur Plant Parts Through the Growing Season
M. Ralphs, Dale R. Gardner
2003Journal of Chemical Ecology23 citations
Semantic Scholar
Ecological relationships between poisonous plants and rangeland condition: a review.
M. Ralphs
200223 citations Open access
Semantic Scholar
Detection of swainsonine and isolation of the endophyte Undifilum from the major locoweeds in Inner Mongolia
Xin-Lei Gao, D. Cook, M. Ralphs, Ling Yan +5 more
201222 citations
Semantic Scholar
Reproductive losses to poisonous plants: influence of management strategies.
K. Panter, L. James, D. Gardner, M. Ralphs +3 more
200222 citations Open access
Semantic Scholar
Seeding Cool-Season Grasses to Suppress Broom Snakeweed (Gutierrezia sarothrae), Downy Brome (Bromus tectorum), and Weedy Forbs
E. Thacker, M. Ralphs, T. Monaco
2009Invasive Plant Science and Management21 citations
Semantic Scholar
CHAPTER 66 – Important poisonous plants of the United States
K. Panter, D. Gardner, S. T. Lee, J. Pfister +3 more
200721 citations
Semantic Scholar
Alkaloids as anti-quality factors in plants on western U.S. rangelands
J. Pfister, K. Panter, D. Gardner, B. Stegelmeier +3 more
200421 citations
Semantic Scholar
Correlation of an endophytic fungus (Alternaria spp.) with the presence of swainsonine in lambert locoweed (Oxytropis lambertii).
D. Gardner, J. Romero, M. Ralphs, R. Creamer +3 more
200421 citations
Semantic Scholar
Genetic variation within and among 22 accessions of three tall larkspur species (Delphinium spp.) based on RAPD markers
Xiaomei Li, M. Ralphs, D. Gardner, R. Wang
200221 citations
Semantic Scholar
Impact of locoweed poisoning on grazing steer weight gains.
M. Ralphs, David W. Graham, G. Duff, B. Stegelmeier +1 more
200020 citations Open access
Semantic Scholar
Broom Snakeweed (Gutierrezia sarothrae): Toxicology, Ecology, Control, and Management
M. Ralphs, K. McDaniel
2011Invasive Plant Science and Management19 citations
Semantic Scholar
Lupine-Induced Crooked Calf Disease: The Last 20 Years
Stephen T. Lee, K. Panter, C. Gay, J. Pfister +8 more
200819 citations Open access
Semantic Scholar
Population cycles of broom snakeweed in the Colorado Plateau and Snake River Plains.
M. Ralphs, K. Sanders
200219 citations
Semantic Scholar
Conditioned Food Aversion: From Theory to Practice
M. Ralphs, F. Provenza, J. Pfister, David W. Graham +2 more
200119 citations
Semantic Scholar
Cattle Consumption of Velvet Lupine (Lupinus leucophyllus) in the Channel Scablands of Eastern Washington
M. Ralphs, K. Panter, C. Gay, E. Motteram +1 more
200617 citations Open access
Semantic Scholar
Cattle Grazing as a Biological Control for Broom Snakeweed: Vegetation Response
M. Ralphs, J. Banks
200916 citations Open access
Semantic Scholar
The comparative pathology of locoweed poisoning in livestock, wildlife and rodents.
B. Stegelmeier, S. T. Lee, L. James, D. Gardner +4 more
200715 citations
Semantic Scholar
Implementing Ecologically Based Invasive Plant Management: Lessons From a Century of Demonstration Projects in Park Valley, Utah
L. R. Morris, T. Monaco, C. Call, R. Sheley +1 more
201114 citations Open access
Semantic Scholar
Alkaloid levels in Duncecap (Delphinium occidentale) and Tall larkspur (D. barbeyi) grown in reciprocal gardens: separating genetic from environmental influences.
M. Ralphs, D. Gardner
2001Biochemical Systematics and Ecology14 citations
Semantic Scholar
Alkaloids as anti-quality factors in plants on western U.S. rangelands.
J. Pfister, K. Panter, D. Gardner, B. Stegelmeier +3 more
200114 citations Open access
Semantic Scholar
Crooked Calf Syndrome: Managing Lupines on Rangelands of the Channel Scablands of East-Central Washington State
K. Panter, E. Motteram, D. Cook, Stephen Lee +3 more
200913 citations Open access
Semantic Scholar
Conditioning cattle to graze broom snakeweed (Gutierrezia sarothrae).
M. Ralphs, R. Wiedmeier
2004Journal of Animal Science13 citations
Semantic Scholar
Decreasing Forage Allowance Can Force Cattle to Graze Broom Snakeweed (Gutierrezia Sarothrae) as a Potential Biological Control
M. Ralphs, R. Wiedmeier, J. Banks
200712 citations Open access
Semantic Scholar
Clipping and precipitation influences on locoweed vigor, mortality, and toxicity
M. Ralphs, D. Gardner, J. D. Graham, G. Greathouse +1 more
200212 citations Open access
Semantic Scholar
Solutions to Locoweed Poisoning in New Mexico and the Western United States
David W. Graham, R. Creamer, D. Cook, B. Stegelmeier +9 more
200911 citations
Semantic Scholar
Response of Broom Snakeweed (Gutierrezia sarothrae) and Cool-Season Grasses to Defoliation
M. Ralphs
2009Invasive Plant Science and Management11 citations
Semantic Scholar
A close look at locoweed poisoning on shortgrass prairies.
M. Ralphs, J. D. Graham, L. James
200211 citations Open access
Semantic Scholar

Frequent co-authors

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D. Gardner×22
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D. Gardner — researcher profile on SciRah
J. Pfister×18
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K. Panter×15
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B. Stegelmeier×13
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×12

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D. Cook — researcher profile on SciRah

Stephen T. Lee×11

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K. Welch — researcher profile on SciRah

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L. James — researcher profile on SciRah

Dale R. Gardner×7

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Dale R. Gardner — researcher profile on SciRah

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Daniel S. Grum×4

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Daniel S. Grum — researcher profile on SciRah

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E. Motteram — researcher profile on SciRah