Results 151 to 160 of about 948 (186)
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Effect of Feeding Ergovaline and Ergine on Growing Rats
1997The ergot alkaloids and specifically the ergopeptide, ergovaline have been implicated as alkaloids which are responsible for producing fescue toxicosis. Because of the lack of availability of the suspect alkaloids, studies using fescue alkaloids have been limited to in vitro or in vivo studies in which small quantities of the drug is injected or ...
E. L. Piper +4 more
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Effects of feeding ergovaline on lamb performance in a heat stress environment
Journal of Animal Science, 2003Lambs exposed to a heat-stressed environment (33 degrees C, 50% relative humidity) were used in three experiments to determine whether ergovaline (EV) is the primary toxin involved in fescue toxicosis. The first study evaluated the effects of feeding diets containing increasing levels of endophyte-infected tall fescue seed (E+) and decreasing levels of
M S, Gadberry +3 more
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Journal of Chromatography B, Biomedical Sciences and Applications, 1999
A high-performance liquid chromatographic method for the determination of the mycotoxin ergovaline in goat's milk is described here. Ergotamine was used as an internal standard. For a sample size of 5.0 ml, the cleanup method included precipitation of milk protein with acetone.
Patrice Garcia, Y Bonnaire
exaly +4 more sources
A high-performance liquid chromatographic method for the determination of the mycotoxin ergovaline in goat's milk is described here. Ergotamine was used as an internal standard. For a sample size of 5.0 ml, the cleanup method included precipitation of milk protein with acetone.
Patrice Garcia, Y Bonnaire
exaly +4 more sources
Journal of Agricultural and Food Chemistry, 2015 Ergovaline is an ergot alkaloid produced by the symbiotic endophyte Epichloë coenophiala, which can colonize varieties of the cool-season grass tall fescue (Festuca arundinacea).
Jennifer M Duringer, A Morrie Craig
exaly +2 more sources
Ergovaline Concentration of Tall Fescue as Affected by Limestone Application
Crop, Forage & Turfgrass Management, 2018Core Ideas Limestone application reduced ergovaline concentrations by 20 ppb compared with non‐treated control plots. This slight reduction in ergovaline concentrations is not enough to affect toxicosis, but the reduction occurred with a corresponding increase in soil pH, which can improve the growing conditions for pasture legumes and indirectly ...
Sarah L. Kenyon +5 more
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American Journal of Veterinary Research, 2006
Abstract Objective—To investigate the effects of IV administration of ergotamine and ergovaline and intraruminal administration of ergotamine on electromyographic (EMG) activity of reticuloruminal smooth muscle in conscious sheep. Animals—3 sheep with indwelling electrodes in the musculature of the reticulum and rumen.
Lance M, McLeay, Barry L, Smith
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Abstract Objective—To investigate the effects of IV administration of ergotamine and ergovaline and intraruminal administration of ergotamine on electromyographic (EMG) activity of reticuloruminal smooth muscle in conscious sheep. Animals—3 sheep with indwelling electrodes in the musculature of the reticulum and rumen.
Lance M, McLeay, Barry L, Smith
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Ergovaline and Ergot Alkaloid Concentrations Change in Conserved Tall Fescue
Forage & Grazinglands, 2011Ergot alkaloids are toxins in tall fescue that cause severe reductions in animal gain, reproduction, and milk production. This study was conducted over a 2‐year period to determine the change in concentrations of ergovaline and total ergot alkaloids in tall fescue as it is conserved as silage, hay, and ammoniated hay.
Craig A. Roberts +3 more
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Quantification of Ergovaline in Tall Fescue by Near Infrared Reflectance Spectroscopy
Crop Science, 1997Near infrared (NIR) reflectance spectroscopy was examined as a possible alternative to high performance liquid chromatography (HPLC) analysis for ergovaline in tall fescue (Festuca arundinacea Schreber). Tall fescue samples were collected from field plots in Missouri and analyzed by NIR spectroscopy and HPLC.
C. A. Roberts +2 more
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Ergovaline Distribution in Perennial Ryegrass Naturally Infected with Endophyte
1997Recently there has been renewed interest in the possible impact on animal health and performance and insect resistance of ergovaline in perennial ryegrass (Lolium perenne) naturally infected with Neotyphodium lolii. In an earlier limited study of vegetative plants, ergovaline was found to be concentrated in basal tissues (Davies et al., 1993).
G. A. Lane +3 more
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Journal of Agricultural and Food Chemistry, 1991
(.)The detection limit of ergovaline in fescue seed and vegetative tissue was 50 μg/kg. Replicate samples, collected each week during two growing seasons from experimental plots of KY-31 tall fescue (85-100% endophyte-infested), were separated into stems with leaf sheaths, leaf blades and developing seed heads.
George E. Rottinghaus +3 more
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(.)The detection limit of ergovaline in fescue seed and vegetative tissue was 50 μg/kg. Replicate samples, collected each week during two growing seasons from experimental plots of KY-31 tall fescue (85-100% endophyte-infested), were separated into stems with leaf sheaths, leaf blades and developing seed heads.
George E. Rottinghaus +3 more
openaire +1 more source