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Victoria worms, flies and lice update - October 2020

VIC WormBoss Worm Control Programs

VIC WormBoss Drench Decision Guides

Sheep

Goats

Sheep

Goats

Lexie Leonard, Livestock Logic (l.leonard@livestocklogic.com.au)

Spring continues in South-West Victoria, rain keeps coming and pastures keep growing. Worm management and drenching advice remains the same from previous weeks — continue to monitor worm egg count (WEC or WormTest) results and drench as appropriate.

Approximately 30% of all sheep being tested through the lab have required drenching in the past four weeks, which shows worm burdens remain high in mature sheep, hoggets and weaners. This year’s weaned lambs and calves will be at the highest risk, so close monitoring is imperative. We have seen cases where high larval worm burdens are causing scouring aegnd low growth rates in mobs of weaned lambs that will not show up on a WEC. Combining regular WEC testing with visual monitoring of mobs is imperative. Low levels of coccidia burdens have also been showing up in some mobs, but more so in drier areas with higher levels of nutritional stress.

Approaching November we expect to see similar worm issues as for October, WEC and drench timing for lambs and 2019 weaners will be critical. We don’t expect pasture to begin drying off until at least December, so only drenching mature ewes that have high worm burdens, or low condition scores are indicated in November.

A reminder to start checking your rams if you haven’t already, and ensure they are WEC tested and then drenched (if required) with an appropriate drench 12 weeks prior joining, and again six weeks prior joining.

Fly and lice impacts remain low while the temperatures remain low. Close monitoring, especially in lambs, is important to be able to treat before production losses occur.

For October 2020 state outlooks, please follow the links below:
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