Evaluation of Long-Acting Eprinomectin Compared to Conventional Anthelmintics in Cow/Calf Production

<p>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</p>

Name thesis:degree_name

Doctor of Philosophy in Animal Science (PhD)

Level thesis:degree_level

Dissertation

Year dc:date.available

2016

Author dc:creator

• Backes, Elizabeth Ann

Advisor dc:contributor.advisor

• Powell, Jeremy G.

Contributors dc:contributor

• Kegley, Elizabeth B.
• Yazwinski, Thomas A.

• Biological sciences
• Long-acting eprinomectin
• Moxidectin
• Oxfendazole
• Performance
• Replacement heifers
• Spring-calving cows
• Animal Studies
• Zoology

Repository record dc:identifier

https://scholarworks.uark.edu/etd/1677

OAI identifier oai:identifier

oai:scholarworks.uark.edu:etd-3216