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Tall Fescue Toxicosis and Management
Crop Management, 2004Tall fescue toxicosis is one of the most costly animal disorders facing livestock producers in the eastern U.S. As reported by Georgia researchers in 1977, it is caused by a fungal endophyte. At present, there is no cure for tall fescue toxicosis. There are, however, proven management strategies that can lessen the effect of toxicosis.
Craig Roberts, John Andrae
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Diagnostic Tool for Fescue Toxicosis
American Association of Bovine Practitioners Conference Proceedings, 1997Fescue toxicosis is the result of grazing endophyte (Neotyphodium coenophialum) infected tall fescue (Festuca arundinacea). Most tall fescue pastures are endophyte-infected (E+) and this results in the presence of ergot alkaloids in the forage. As a result of these alkaloids in E+, rate of gain and calving rates are decreased (Stuedemann and Hoveland ...
Thompson, F. N. +3 more
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Veterinary Clinics of North America: Equine Practice, 2001
Most of the tall fescue pastures in the United States are infected by an endophyte, N. coenophialum. The fungus derives nutrients from the plant while supplying the plant with toxins for defense. The most detrimental toxins for animals in tall fescue are ergopeptine alkaloids, especially ergovaline.
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Most of the tall fescue pastures in the United States are infected by an endophyte, N. coenophialum. The fungus derives nutrients from the plant while supplying the plant with toxins for defense. The most detrimental toxins for animals in tall fescue are ergopeptine alkaloids, especially ergovaline.
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Selected Hormonal Changes with Summer Fescue Toxicosis
Journal of Animal Science, 1987The effects of fescue endophyte content (low, 16 or high, 44% of tillers examined) and of N fertilization rate (low, 134 kg N.ha-1.yr-1 or high, 336 kg N.ha-1.yr-1) upon serum prolactin (PRL) in Angus steers were examined. Jugular blood samples for serum PRL determination were taken before (basal) and after thyrotropin releasing hormone (TRH ...
F N, Thompson +4 more
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Tall fescue summer toxicosis in cattle
The Bovine Practitioner, 1982Cattle grazing tall fescue at times display signs of various toxicity syndromes. Among these conditions are fescue foot, fat necrosis, and fescue summer toxicosis. Fescue foot is a condition which ranges from mild lameness to severe gangrenous lesions of the feet and tail and occurs primarily during cold winter weather.
Hammond, Andrew C. +2 more
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Effects of fescue toxicosis on reproduction in livestock
Journal of Animal Science, 1992Fescue toxicosis in livestock is due to ingestion of endophyte (Acremonium coenophialum) -infected tall fescue. Understanding mechanisms responsible for decreased calving and growth rates, delayed onset of puberty, and impaired function of corpora lutea in heifers at puberty consuming endophyte-infected fescue is an emerging field in reproductive ...
J K, Porter, F N, Thompson
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The effects of fescue toxicosis on beef cattle productivity
Journal of Animal Science, 1995Consumption of tall fescue forage infested with the endophytic fungus Acremonium coenophialum can result in a condition termed "fescue toxicosis," which is characterized by decreased weight gains, milk production, conception, and serum prolactin and an inability to dissipate body heat by beef cattle.
J, Paterson +4 more
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Immunosuppression in Cattle with Fescue Toxicosis
1997Anecdotal observations suggest that cattle entering feed lots after grazing endophyte-infected tall fescue have increased morbidity and mortality (Purdy et al.,1989). The morbidity and mortality has been interpreted as resulting from reduced immune functions in animals with fescue toxicosis.
D. L. Dawe +3 more
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Abdominal lipomatosis attributed to tall fescue toxicosis in deer
Journal of the American Veterinary Medical Association, 1998Five adult female Eld's deer died acutely or were euthanatized because of clinical signs including anorexia, signs of depression, and uremia. On necropsy, these deer had large masses of necrotic abdominal fat constricting the ureters, causing hydroureter and hydronephrosis. The herd from which these deer originated was maintained on pastures consisting
B A, Wolfe +5 more
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1997
Approximately 688,000 horses in the U.S. graze tall fescue (Hoveland, 1993), and for many years, veterinarians and horse owners have reported reproductive problems in mares that consume tall fescue (Garrett et al., 1980; Villahoz et al., 1984; Poppenga et al., 1984). Bacon et al.
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Approximately 688,000 horses in the U.S. graze tall fescue (Hoveland, 1993), and for many years, veterinarians and horse owners have reported reproductive problems in mares that consume tall fescue (Garrett et al., 1980; Villahoz et al., 1984; Poppenga et al., 1984). Bacon et al.
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