Efficacy of Endo-Fighter for Reducing Severity of Tall Fescue Toxicosis in Beef Cattle1

2010 ◽  
Vol 26 (2) ◽  
pp. 212-221 ◽  
Author(s):  
R. Norman ◽  
A.E. Fisher ◽  
C.D. Lane ◽  
S.S. Block ◽  
W.W. Gill ◽  
...  
2012 ◽  
Vol 44 (4) ◽  
pp. 577-592 ◽  
Author(s):  
Stephen A. Smith ◽  
James D. Caldwell ◽  
Michael P. Popp ◽  
Kenneth P. Coffey ◽  
John A. Jennings ◽  
...  

Tall fescue toxicosis adversely affects calving rate and weight gains reducing returns to cow-calf producers in the south–central United States. This grazing study estimated animal and economic performance implications of endophyte-infected fescue and calving season. Establishing novel endophyte-infected tall fescue on 25% of pasture acres resulted in improved calving rates (87% vs. 70%), weaning weights (532 lbs vs. 513 lbs), and partial returns per acre ($257 vs. $217). Additionally, fall-calving cows had higher calving rates (91% vs. 67%), weaning weights (550 lbs vs. 496 lbs), and partial returns per acre ($269 vs. $199) than spring calving cows.


2007 ◽  
Vol 13 ◽  
pp. 369-372
Author(s):  
L.L. Blythe ◽  
A.M. Craig ◽  
C. Estill ◽  
C. Cebra

There are multiple vehicles for endophyte toxicosis in animals including exposure from pasture, straw residues and seed screenings. This report discusses the clinical cases typically seen with tall fescue and perennial ryegrass toxicosis in Oregon and Japan. Case I involves a herd of 330 Black Angus cattle. Before the March calving season the owner wished to increase the protein content of the feed ration by feeding pellets made of seed screenings and grass hay. Forty two animals were lost to tall fescue toxicosis and dry gangrene of the feet and legs. Case II involves 1300 beef cows in Eastern Oregon fed grass straw; 485 animals were lost due to dry gangrene characteristic of tall fescue toxicosis. Case III describes 4 of 15 cases of both tall fescue and perennial ryegrass toxicosis in Japanese black cattle. Case IV involves llamas and alpacas on pasture and lawn paddocks where some animals were affected by tall fescue and some by perennial ryegrass. Keywords: tall fescue, Festuca arundinacea L., perennial ryegrass, Lolium perenne, endophyte, Neotyphodium coenophialum, Neotyphodium lolii


2004 ◽  
Vol 3 (1) ◽  
pp. 1-18 ◽  
Author(s):  
Craig Roberts ◽  
John Andrae

1998 ◽  
Vol 23 ◽  
pp. 1-11
Author(s):  
C.A. Morris

SummaryThis review summarises evidence for genetic variation ofBos tauruscattle to diseases encountered under temperate conditions, including internal and external parasitism, susceptibility to mycotoxic diseases (tall fescue toxicosis, facial eczema, ryegrass staggers), mastitis, ketosis, pasture bloat, leukosis, tuberculosis, foot and mouth, brucellosis and BSE. Averaging mean heritability estimates reviewed from 8 diseases (weighted equally) gave a value of 0.21, indicating that measurable genetic variation for disease traits inBos tauruscattle is somewhat less than that for production traits, such as milk yield or body weight. Many estimates, however, have high standard errors, and there could be an upward bias resulting from non-reporting of zero or non-significant estimates.Few single-trait selection experiments have been conducted to study the genetics of disease resistance traits in cattle. For the disease traits where selection is being applied extensively, index selection for improved disease resistance and increased production is more common than single-trait selection. Results from a long-term (25 year) divergent selection experiment with resistance/susceptibility to pasture bloat in cattle in New Zealand are reviewed. Four single-year experiments comparing progeny of ‘high’ versus ‘low’ sires for resistance to disease are also reviewed, one in Australia studying faecal nematode egg counts, one in the USA involving the mycotoxic disease, tall fescue toxicosis, a third in New Zealand involving the mycotoxic disease, facial eczema, and a fourth in the USA involvingBrucella abortus.


2015 ◽  
Vol 93 (12) ◽  
pp. 5485-5486
Author(s):  
G. Scaglia ◽  
P. Beck ◽  
M. H. Poore ◽  
J. Lehmkuhler

2003 ◽  
Vol 81 (11) ◽  
pp. 2856-2868 ◽  
Author(s):  
J. A. Parish ◽  
M. A. McCann ◽  
R. H. Watson ◽  
N. N. Paiva ◽  
C. S. Hoveland ◽  
...  

2007 ◽  
Vol 13 ◽  
pp. 233-236
Author(s):  
J.G. Andrae ◽  
C.A. Roberts

Bacon and others discovered the tall fescue endophyte in 1977. Since that time, North American researchers have developed several endophyte-based technologies to reduce fescue toxicosis. The most recent has been the release of MaxQ, a novel endophyte that enhances persistence but does not cause fescue toxicosis. Despite its advantages, MaxQ has been adopted slowly across the fescue belt of the US. This paper presents possible social and managerial reasons for this slow adoption. It closes by offering some possible solutions. Keywords: MaxQ, novel endophyte, tall fescue toxicosis, pasture renovation, educational efforts


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