Parasite control in regenerative livestock farming

Abstract

Advocates of regenerative livestock farming claim a multitude of benefits following adoption of practices based on high intensity, short duration, long rest rotational grazing, amongst which is a reduction in parasitism and the use of anthelmintics. There are limited scientific data to support such claims and much of what little evidence there is emanates from North America and South Africa, so it would be useful if the observations and experiences of UK adoptees could be backed up with some well-controlled field studies. In their absence, considerations of some aspects of known parasite biology, such as the larval ecology of parasitic nematodes, can shed light on likely outcomes of various types of pasture, grazing and animal management. Minimising the use of anthelmintics in regenerative systems requires effective monitoring to ensure that animal performance and health do not suffer as a result of parasitism; for youngstock, growth rate is the most reliable marker for subclinical parasitic gastroenteritis. Consideration should also be given to other parasites that can affect grazing livestock, such as lungworm, fluke, ticks and flies, in order to determine the influence of regenerative management on the parasite fauna and their collective impact on sheep and cattle.