The episode is dedicated to the late Dr Dave Leathwick, AgResearch parasitologist, scientist and champion for the battle against drench resistance.

A closer look at drench resistance in dairy systems highlights how rapidly conventional parasite control methods are becoming less effective and why farmers need to take a more strategic approach. WormWise programme manager and veterinarian Ginny Dodunski unpacks the latest data and on-farm observations, explaining what drench resistance is, how it develops over time, and why it can remain hidden until it starts affecting animal performance.

Host:
Anne Lee, Senior Journalist, Dairy Country

Guest:
Ginny Dodunski, Programme Manager, WormWise

 

Using recent research and real-world examples, Ginny outlines the increasing presence of resistant Cooperia and Ostertagia in young cattle, including cases where commonly used combination drenches are no longer doing the job. She discusses how drench selection, frequency, and inconsistent dosing, particularly with pour-on products, can contribute to resistance, and why early and accurate testing is essential to understand what is happening onfarm.

The discussion also turns to practical ways farmers can reduce reliance on drenches. Ginny highlights the importance of pasture management, calf nutrition, and grazing strategies in lowering worm challenge. She explains why reducing exposure to worms in the first place can be more effective than trying to treat them later. Alongside the science, she reinforces the value of good decision making and working alongside vets to build more resilient, future proof farming systems.

 

New Wormwise Handbook:

https://beeflambnz.com/knowledge-hub/PDF/wormwise-resource-book.pdf

Pamu case studies:

https://www.pamunewzealand.com/pamunewzealand-pmu3/images/2024-Drench-resistance-and-parasite-management-at-P%C4%81mu.pdf

Wormwise resistance report:

https://beeflambnz.com/knowledge-hub/PDF/convenience-sample-cattle-faecal-egg-count-reduction-tests-new-zealand-2021-2024

 

Sign up to the weekly DAIRY Country email newsletter here: https://dairycountry.co.nz/sign-up/

The episode is dedicated to the late Dr Dave Leathwick, AgResearch parasitologist, scientist and champion for the battle against drench resistance.
A closer look at drench resistance in dairy systems highlights how rapidly conventional parasite control methods are becoming less effective and why farmers need to take a more strategic approach. WormWise programme manager and veterinarian Ginny Dodunski unpacks the latest data and on-farm observations, explaining what drench resistance is, how it develops over time, and why it can remain hidden until it starts affecting animal performance.
Host:
<ul>
<li aria-level="1">Anne Lee, Senior Journalist, Dairy Country</li>
</ul>
Guest:
<ul>
<li aria-level="1">Ginny Dodunski, Programme Manager, WormWise</li>
</ul>
&nbsp;
Using recent research and real-world examples, Ginny outlines the increasing presence of resistant Cooperia and Ostertagia in young cattle, including cases where commonly used combination drenches are no longer doing the job. She discusses how drench selection, frequency, and inconsistent dosing, particularly with pour-on products, can contribute to resistance, and why early and accurate testing is essential to understand what is happening onfarm.
The discussion also turns to practical ways farmers can reduce reliance on drenches. Ginny highlights the importance of pasture management, calf nutrition, and grazing strategies in lowering worm challenge. She explains why reducing exposure to worms in the first place can be more effective than trying to treat them later. Alongside the science, she reinforces the value of good decision making and working alongside vets to build more resilient, future proof farming systems.
&nbsp;
New Wormwise Handbook:
<a href="https://beeflambnz.com/knowledge-hub/PDF/wormwise-resource-book.pdf">https://beeflambnz.com/knowledge-hub/PDF/wormwise-resource-book.pdf</a>
Pamu case studies:
<a href="https://www.pamunewzealand.com/pamunewzealand-pmu3/images/2024-Drench-resistance-and-parasite-management-at-P%C4%81mu.pdf">https://www.pamunewzealand.com/pamunewzealand-pmu3/images/2024-Drench-resistance-and-parasite-management-at-P%C4%81mu.pdf</a>
Wormwise resistance report:
<a href="https://beeflambnz.com/knowledge-hub/PDF/convenience-sample-cattle-faecal-egg-count-reduction-tests-new-zealand-2021-2024">https://beeflambnz.com/knowledge-hub/PDF/convenience-sample-cattle-faecal-egg-count-reduction-tests-new-zealand-2021-2024</a>
&nbsp;
Sign up to the weekly DAIRY Country email newsletter here: <a href="https://dairycountry.co.nz/sign-up/">https://dairycountry.co.nz/sign-up/</a>

DAIRY Country is your mainstay in dairy farming as your trusted source for adding value to your dairy farming business with seasonal on farm stories and exclusive technical advice weekly with your host, Anne Lee.

Formally the NZ Dairy Exporter since 1925, DAIRY Country is part of the CountryWide network based in Canterbury, New Zealand.

Get in touch with our Anne Lee - anne@countrywidemedia.co.nz if you have a great insight to share with our
thousands of readers and listeners in New Zealand and around the world.

Don’t miss our weekly episodes of the DAIRY Country Podcast by hitting the subscribe button now and join our DAIRY Country weekly email newsletter to get the latest in-depth stories in your mailbox so you are always ahead of the game in the
business of dairy farming into the future.

DAIRY Country is your mainstay in dairy farming as your trusted source for adding value to your dairy farming business with seasonal on farm stories and exclusive technical advice weekly with your host, Anne Lee.
Formally the NZ Dairy Exporter since 1925, DAIRY Country is part of the CountryWide network based in Canterbury, New Zealand.
Get in touch with our Anne Lee - anne@countrywidemedia.co.nz if you have a great insight to share with our thousands of readers and listeners in New Zealand and around the world.
Don&rsquo;t miss our weekly episodes of the DAIRY Country Podcast by hitting the&nbsp;subscribe button now and <a href="https://dairyexporter.co.nz/sign-up/">join our DAIRY Country weekly email newsletter</a> to get the&nbsp;latest in-depth stories in your mailbox so you are always ahead of the game in the business of dairy farming into the future.