Four hundred and ten cow-calf pairs were allotted to tall fescue pastures
containing 40, 45, or 70% endophyte fungus infestation. One half of the calves in
each pasture were implanted with Ralgro® initially and reimplanted about 110 days
later. Calf gains on the 70% endophyte fungus pasture showed a greater (P<.05)
response to implanting than those grazing the 40 and 45% endophyte-infested tall
fescue pastures during the 165 day trial.