Abstract
ABSTRACT A field trial and 2 grazing experiments were conducted to determine the efficacy of Endo-Fighter (ADM Alliance Nutrition Inc., Quincy, IL), a product designed for cattle grazing wild-type endophyte-infected tall fescue (Lolium arundinaceum). A 126-d (June 1 to October 5) field trial with beef (Bos taurus) steers (BW = 275 ± 2.3 kg) had 2 treatments: a control (n = 53; MasterGain mineral, ADM Alliance Nutrition Inc.) and Endo-Fighter (n = 67; MasterGain mineral with Endo-Fighter). There was no difference (P > 0.05) in BW gain between the control and Endo-Fighter treatments. During midday, more (P 0.05) by feeding Endo-Fighter or the prototype in either grazing experiment. Consumption of Endo-Fighter altered animal grazing behavior, but did not affect the BW gain of cattle consuming wild-type endophyte-infected tall fescue.
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