Title: Effects of EndophyteInfected Fescue on Animal Performance
1Effects of Endophyte-Infected Fescue on Animal
Performance
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2Effects of Endophyte on Animals
- Decreased feed intake
- Decreased performance
- Weight gain
- Weaning weights
- Milk production
- Decreased reproductive performance
- Increased body temperature
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3Effects of Endophyte on DMI and Gain of Grazing
Steers
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4Gain for Steers Grazing Fescue, Summary of 12
Trials
Journal of Animal Science
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5Effect of Endophyte and Intake of Steers Grazing
Fescue
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6Effects of the Endophyte on Performance (3 year
summary)
KY Progress Report 306, 1988 pg. 25
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7Endophyte affects young cows more severely
KY Field Day Report- 1985
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8Effect of endophyte infection
JAS 63 (Suppl.1)296, ALA Ag. Exp Station 33(4)15
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9Winter Performance of Heifers Fed Hay from 11/29
to 2/21
KY Progress Report 282- pg. 6
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10Effects of Endophyte Fescue on Grazing Management
and Grazing Responses
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11Endophyte decreases grazing time
Ref Agron. J. 76707
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12ADG of Cattle Grazing E. Infected Fescue with or
without Shade from 5/7 to 6/2
KY Progress Report 417- 1999 pg. 24
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13ADG and Body Temperature of Steers Grazing
Stockpiled Fescue from 11/11 to 12/22
KY Progress Report 282, pg. 6
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14Coping with Dirty Fescue
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15Coping with Dirty Fescue
- 1. Dilution with clover---
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16Conception Rate of Cows Grazing Fescue over 4
years
KY Progress Report 282 pg.7
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17Coping with Dirty Fescue
- With spring calving herd--- Graze alternative
crops in the summer - Examples warm season grasses (Gamma grass,
sorghum-sudan grass, green corn)
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18Coping with Dirty Fescue
- 3. Keep vegetative seed heads highest
concentration
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19Coping with Dirty Fescue
- 4. Replace (especially when reseeding) E.
infected fescue with - Novel endophyte fescue varieties
- Endophyte free varieties
- Other forage crops
- Not always feasible
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20Coping with Dirty Fescue
- 5. Refine management practices
- Do not breed cows in summer
- Calve in the fall versus spring
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21Effect of time of breeding on conception rate
with E. Infected Fescue, 2 year summary
KY 1996 Avg Days with temperature 90 June
10, July 19
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22Effect of Calving Season on Cow-Calf Productivity
Grazing E. Infected Fescue over 4 years
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23Coping with Dirty Fescue
- 6. Free-choice Mineral Fescue Mineral
- Cattle grazing fescue and other cool-season
grasses are not receiving adequate Copper,
Selenium, Manganese and other trace minerals from
the forage. - The use of a high quality mineral supplement will
improve performance. - This has nothing to do with overcoming the
endophyte.
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24Coping with Dirty Fescue
- 7. Additives
- MTB-100 (Alltech)
- Tasco (Acadian AgriTech)
- Mix-30 (Agridyne)
- Yeast-based product (ADM Alliance Nutrition)
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25MTB-100 Added to Free-Choice Mineral
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26Tasco Additive
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27MIX-30 on Reproduction of Beef Cows Grazing
Endophyte Fescue, Results
2002 KY Ruminant Nutrition Workshop, p. 7
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28Yeast-Based Product Supplied in Free-choice
Mineral
ADM Alliance Nutrition, MO Field Trial 7/3 to
10/20, 2004
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29Questions???
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30Supplements fed at a daily level of 6 pounds per
head
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