Plant toxins and palatability to herbivores.

@article{Molyneux1992PlantTA,
  title={Plant toxins and palatability to herbivores.},
  author={R. Molyneux and M. Ralphs},
  journal={Journal of Range Management},
  year={1992},
  volume={45},
  pages={13-18}
}
Paper presented at the "Symposium on Ingestion of Poisonous Plants by Livestock," February 15, 1990, Reno, Nevada. 
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Highlight: Early literature generally described toxic plant substances as waste products. However, more recent publications in entomology, plant biochemistry, and other fields suggest that toxicExpand
Hound's-tongue (Cynoglossum officinale) poisoning in a calf.
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The plant, commonly known as hound's tongue, contains pyrrolizidine alkaloids and has been determined to be toxic to horses fed contaminated hay, but was fed to cattle at the same time with no effect. Expand
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It is indicated that there is a threshold level of PA that must be exceeded for the toxicosis to develop in cattle and the importance of the time-dose relationship in PA toxicosis in cattle is emphasized. Expand
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Toxicity of threadleaf groundsel (Senecio douglasii var longilobus) to cattle.
TLDR
It is indicated that there is a threshold level of PA that must be exceeded for the toxicosis to develop in cattle and the importance of the time-dose relationship in PA toxicosis in cattle is emphasized. Expand
Development of Dietary Choice in Livestock on Rangelands and its Implications for Management
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Diet training may enable managers to create a foraging group more suited to management goals and additional research is needed to determine how age at which exposure occurs, as well as how duration, intensity, variability and complexity of exposure early in life affect dietary habits of adults. Expand
Cattle grazing Wahweap milkvetch in southeastern Utah.
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Because senescent stalks of Wahweap milkvetch are palatable and readily grazed by cattle, ranchers should not permit cattle to graze infested sites until other green forage is available in the spring. Expand
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Calves fed S riddellii to provide 10 mg of PA/kg of body weight/day in capsules or by gavage for 20 consecutive days did not develop clinical signs of seneciosis and did not have meaningful serum enzyme changes, but feedings of the plant that provided 15 to 20 mg ofPA/kg/day or more resulted in high mortality. Expand
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Results of the experimental intoxications indicate that if the daily dosage is of sufficient size to insult hepatocytes, a chronic lethal dose of plant may be eaten in only a few days, and death imminent soon thereafter. Expand
Cynoglossum officinale (hound's-tongue)--a cause of pyrrolizidine alkaloid poisoning in horses.
TLDR
Hound's-tongue was found to contain large quantities of toxic pyrrolizidine alkaloids, which, when fed to a pony for 20 days, caused liver fibrosis and biliary hyperplasia. Expand
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