It has been known for many years that plants containing condensed tannins (CT) benefit the general health of grazing animals in several ways, including preventing bloat and reducing parasitism. Some trials have also confirmed an improved wool clip, reduction in the excretion of urinary nitrogen, and a significant reduction in methane output.

A working group in Marlborough lead by retired vet Peter Anderson and Bruce Clark (Kiwi Seeds) has been established to build more knowledge and clarity on the subject as few studies worldwide have ever determined how to practically and economically incorporate what is known about CTs into farming practices. With the ever-increasing cost of drench resistance, we believe the role of bioactive plants (those containing CTs) to prevent parasitism is going to be very important.

However not many grazing plants contain CTs and not all CTs have anthelmintic properties. Two plants with CTs have been selected. Sainfoin with known anthelmintic properties and Arrowleaf Clover (unknown anthelmintic properties) are both available in NZ and 3 sites have already been sown out, all with different aspects, from Lake Grassmere to Picton. All sites have established and will be treated as far as is possible as normal farm paddocks.

Management reports and photos will be provided as we move forward. Kiwi Seeds will advise on plant management and determine DM returns over the growing period, while plant feeding and conservation and the impact of these 2 plant species on parasite control will be determined through controlled trials. This is going to involve significant input by a handful of keen farmers.

Keep your eye on this site. All livestock farmers, both organic and conventional, stand to gain both with animal health and financially from this effort.