Effects of endophyte-infected tall fescue on animal performance

Schmidt, Stephen P.; Osborn, Thomas G.

doi:10.1016/0167-8809(93)90049-u

Cited by 152 publications

(96 citation statements)

References 57 publications

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“…The impact or effects of consumption of E+ tall fescue have been reviewed , Stuedemann and Hoveland 1988, Schmidt and Osborn 1993. Readers are referred to those reviews for specific information on the impact of E+ tall fescue on animal response.…”

Section: Animal Toxicosis-tall Fescuementioning

confidence: 99%

Section: Animal Toxicosis-tall Fescuementioning

confidence: 99%

“…This subject has been reviewed (Porter andThompson 1992, Schmidt andOsborn 1993). In studies summarized by Schmidt and Osborn (1993), lactating beef cows grazing E+ tall fescue both lost weight and had reduced pregnancy rates compared to cows grazing E-tall fescue. A decline in cow body condition postpartum negatively affects reproduction and results in a prolonged interval from parturition to first estrus (Wiltbank et al 1964).…”

Section: Animal Toxicosis-tall Fescuementioning

confidence: 99%

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Anti-quality factors associated with alkaloids in eastern temperate pasture

Thompson¹,

Stuedemann²,

Hill³

2001

REM

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The greatest anti-quality associated with eastern temperature pasture grasses is the result of ergot alkaloids found in endophyte-infected (Neotyphodium ceonophialum) tall fescue (Festuca arundinacea Schreb.) The relationship between the grass and the endophyte is mutalistic with greater persistence and herbage mass as a result of the endophyte. Ergot alkaloids reduce growth rate, lactation, and reproduction in livestock. Significant effects are the result of elevated body temperature and reduced peripheral blood flow such that necrosis may result. Perturbations also occur in a variety of body systems. Planting new pastures with seed containing a "non-toxic" endophyte appears to be a potential solution. Ergotism results from the ingestion of the scelerotia of Claviceps purpurea containing ergot alkaloids found on seed heads. Ergotism resembles the effects of endophyte-infected tall fescue. Endophyte-infected perennial ryegrass (Lolium perenne L.) contains ergot and lotirem alkaloids that result in reduced growth and tremors. Reed canarygrass (Phalaris Anundinacba L.) contains tryptamine, hordenine and gramine alkaloids that reduce growth. Annual ryegrass (Lolium multiplorum L. may contain galls with cornetoxins which result in neurological signs.

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Section: Animal Toxicosis-tall Fescuementioning

confidence: 99%

Section: Animal Toxicosis-tall Fescuementioning

confidence: 99%

Section: Animal Toxicosis-tall Fescuementioning

confidence: 99%

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Anti-quality factors associated with alkaloids in eastern temperate pasture

Thompson¹,

Stuedemann²,

Hill³

2001

REM

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Section: Animal Toxicosis-tall Fescuementioning

confidence: 99%

“…This subject has been reviewed Thompson 1992, Schmidt andOsborn 1993). In studies summarized by Schmidt and Osborn (1993), lactating beef cows grazing E+ tall fescue both lost weight and had reduced pregnancy rates compared to cows grazing E-tall fescue. A decline in cow body condition postpartum negatively affects reproduction and results in a prolonged interval from parturition to first estrus (Wiltbank et al 1964).…”

Section: Animal Toxicosis-tall Fescuementioning

confidence: 99%

Journal of Range Management, Volume 54, Number 4 (July 2001)

2001

REM

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The objectives of this Colorado study were to assess primary reasons ranchers choose to stay or sell the ranch, compare the motivations for ranching between a traditional agriculturally based county and a rapidly developing county, and assess whether factors such as length of tenure, fiscal dependency on ranching, and dependency on public lands play roles in decisions to sell. Personal interviews were conducted with 37 ranchers. While land use conversion occurs for a wide variety of reasons, lack of heirs and detrimental public policy were important reasons given for selling ranches. Responses showed Routt County (a rapidly developing county) ranchers were more likely to sell due to land use conversion related issues than Moffat County ranchers (p = 0.056). Ranchers with a longer legacy on their land reported that profitability, having likely heirs, and continuing tradition enhanced their reasons to stay. Groups more "at risk" of selling were non-homesteading ranchers close to retirement, larger ranches, and ranchers dependent on ranching for income with declining profits. Large ranch owners experiencing land use conflicts with non-ranchers and ranchers modestly dependent on public forage experiencing changes in public policy regulations and land use conflicts also indicated a higher proclivity to sell. Noting how groups of ranchers are impacted by different changes can help refine community efforts related to land use conversion and create more thoughtful policy measures.

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Integrating Genetics, Environment, and Management to Minimize Animal Toxicoses

Stuedemann

Seman

2005

Neotyphodium in Cool‐Season Grasses

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Effects of endophyte-infected tall fescue on animal performance

Cited by 152 publications

References 57 publications

Anti-quality factors associated with alkaloids in eastern temperate pasture

Anti-quality factors associated with alkaloids in eastern temperate pasture

Journal of Range Management, Volume 54, Number 4 (July 2001)

Integrating Genetics, Environment, and Management to Minimize Animal Toxicoses

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