Control of the chewing louse Bovicola (Werneckiella) ocellatus in donkeys, using essential oils.

The research discusses the application of tea tree and lavender essential oils as an effective measure to reduce lice infestation in donkeys, a serious clinical and welfare concern in the management of these large animals.

Introduction

The research paper is grounded on the significant problem of lice infestation in managing large animals like donkeys. This issue is critical to both the health and welfare of the animals. Modern methods of managing lice have seen a decrease in efficiency due to the limited range of commercial pediculicides and the development of resistance. Thus, the researchers have sought to explore alternative approaches to manage this problem.

Experimental Approach

• The researchers used both in vitro and on-farm (in vivo) trials to study the effects of tea tree and lavender essential oils on the populations of the donkey chewing louse, Bovicola ocellatus.
• In a lab setting, they administered contact and vapour bioassays using 5% (v/v) tea tree and lavender oils, observing the effects over 2 hours of exposure.
• On farms, they sprayed the same concentration of these oils on 10 donkeys as part of their usual grooming routines.

Results

• In the lab, over 80% of lice were killed after 2 hours of exposure to 5% (v/v) tea tree and lavender oils.
• The procedure followed on farms also yielded significant results as there was a notable reduction in louse numbers in the donkeys sprayed with the essential oils compared to a control group sprayed with 0.2% polysorbate 80 in water.

Conclusion

The study provides evidence that tea tree and lavender essential oils can effectively control B. ocellatus when used as part of normal grooming routines. These findings hint at the potential of these essential oils as valuable additions to a lice management programme for donkeys, suggesting a basis for further research and development.