Evaluation of Long-Acting Eprinomectin Compared to Conventional Anthelmintics in Cow/Calf Production
Date of Graduation
8-2016
Document Type
Dissertation
Degree Name
Doctor of Philosophy in Animal Science (PhD)
Degree Level
Graduate
Department
Animal Science
Advisor/Mentor
Jeremy G. Powell
Committee Member
Elizabeth B. Kegley
Second Committee Member
Thomas A. Yazwinski
Third Committee Member
Kelly M. Loftin
Keywords
Biological sciences, Long-acting eprinomectin, Moxidectin, Oxfendazole, Performance, Replacement heifers, Spring-calving cows
Abstract
Experiment 1, 83, newly weaned, fall-born crossbred heifer calves were allocated randomly to 1 of 3 anthelmintic treatments: 1) control (CON); 2) combination pour-on moxidectin and oxfendazole (MO); and 3) long-acting eprinomectin (LAE). Two preplanned orthogonal contrast statements were used: 1) to compare CON to treated cattle; and 2) to compare OXF to LAE. Heifer BW and BCS were greater (P≤0.02) from MO and LAE on d 112, 140, 154, 168, 182 compared to CON. Heifer cyclicity, estrous detection, natural service and overall pregnancy rates were greater (P≤0.02) for MO and LAE compared to CON. Cattle fecal egg counts (FEC) were greater (P0.20) between CON and treated cows. Day 14 BCS tended (P=0.07) to be greater for CON compared to treated cows. Also, BCS was greater (P=0.01) and hair coat score was lower (P
Citation
Backes, E. A. (2016). Evaluation of Long-Acting Eprinomectin Compared to Conventional Anthelmintics in Cow/Calf Production. Graduate Theses and Dissertations Retrieved from https://scholarworks.uark.edu/etd/1677