The Farmlander - October 2020

Page 29

ANIMAL MANAGEMENT

Exit drenching after pre-lamb treatments It seems like there is no such thing as just drenching sheep anymore; with terms like knockout drench, exit drench, strategic drench, trigger drench, quarantine drench all becoming more common in our vocabulary. At this time of the year exit drenching is the term that we need to be thinking about the most. The idea behind exit drenching is that animals which were treated with a long acting drench prior to lambing are likely to be approaching the end of the payout period of that product. There is a chance that these ewes are now harbouring parasites that are partially or fully resistant to the active ingredient (or ingredients) of the long acting product. We do not want these parasites to continue producing eggs which contaminate the environment that the lambs are grazing. Parasite resistance is a highly complex issue, with many factors that can lead to resistance on any property. One such counter method would be to use an exit drench in the hoggets and ewes

that were treated with a long acting product. The theory is that a different set of active ingredients will remove any parasites which have survived during the use of the long acting product. Once the majority of parasite are removed by the drench the immune system will be better able to control incoming larvae. The immune system is generally better at stopping developing larvae than it is at removing adults.

a levamisole (clear drench). Due to the

If a long acting injection of Moxidectin has been used then an ideal exit drench would contain a combination of a white and clear. A triple or novel drench is also likely to be effective. In a perfect world the farmer would know which active ingredients or products are 100 percent effective on property and use this information to select the exit drench product. In the absence of this information, using a triple active product such as TrivOX, TrivAL or a novel product are likely to give you the highest chance of being effective.

Tracking faecal egg counts is another

Alternatively, if a white/mectin combination capsule has been used, then the exit drench will need to contain

amount of resistance already identified around New Zealand, the best product for an exit drench here is going to be a triple active such as TrivOX, TrivAL or a novel product again. The same rules apply as for an injectable product; knowing the drench resistance status on the property makes selecting the active ingredients or product a much easier task. method that can help stop resistance developing as a result of long acting drench usage. As animals are approaching the end of the payout period, sequential egg counts can be carried out. If eggs are seen in the faeces this may trigger a drench to be given to the group. As drench products can inhibit egg laying, without necessarily killing parasites, using this method can miss some indication of developing resistance. Knowing the full resistance status of your property is well worthwhile, and running a faecal egg count reduction test every 2–3 years helps farmers know what is going to work best on their farm. Despite the upfront cost of running this test, the information gained can make a significant change in farm profitability especially if there is developing resistance on the farm. For further information, contact your Farmlands Technical Field Officer or the friendly team at your local Farmlands store. Article supplied by Donaghys.

| Exit drenching supports sheep who may have parasites partially or fully resistant to active ingredients in previous drench products.

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Farmlands Co-operative Society Limited | Š October 2020. All rights reserved.

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Real estate market update

4min
pages 66-68

A decade of delivering Gulf

4min
pages 62-65

Preparing your pool for summer

2min
page 61

Support business growth with Fencing Contractors NZ

4min
pages 57-58

Lighting your way in rainy weather

2min
pages 59-60

Century Farms – Dedication across generations in Waipipi

2min
page 52

Smart chemistry puts paid to caterpillars

2min
page 51

The time for critical fungicide application is approaching fast

2min
pages 47-48

Protection. Naturally

3min
pages 49-50

Triumphing over the winter pasture deficit

1min
pages 45-46

Nitrogen losses in nutrient budgets

3min
pages 43-44

This spring, calcium is king

5min
pages 37-40

Exit drenching after pre-lamb treatments

3min
pages 29-30

Optimising cow nutrition to improve fertility

9min
pages 33-36

Complete control of crawling insects

3min
pages 41-42

Food safety for your animals

3min
pages 27-28

Mooving' with the times

3min
pages 21-22

Discover genetics fit for your purpose

2min
page 15

Feeding for optimum performance

2min
pages 25-26

Special Feature – Growing quality partnerships

10min
pages 6-12

Keep your wheels rolling safely this spring

2min
pages 19-20

Connecting to support a common customer

1min
pages 13-14

Nutting out the rabbit problem

2min
pages 17-18

5 minutes with Karin Kos

5min
pages 4-5
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