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Using Worming Treatments At Grass

16 March 2017

If using long-acting wormers in calves at grass over the summer, it is worth knowing how long the products persist for.  It is important to remember that lungworm is generally seen in late summer and autumn, when spring-born calves are eating enough grass to be at risk, and anthelmintic treatments may not be protective.

The table below gives a guide as to how long products will persist as.  These can change, so always consult the data sheet before administering the product.

 

ProductPersistence
Autoworm Finisher 6250 mg Pulsatile-Release Intraruminal Device (oxfendazole)15 weeks
Autoworm First Grazer  8750 mg Pulsatile-Release Intraruminal Device (oxfendazole)21 weeks
Panacur Bolus 12 g, Continuous Release Intraruminal Device (fenbendazole)140 days
Some pour-on ivermectins, such as Animec pour-on 0.5%;  Bimectin 5 mg/ml Pour-on Solution for Cattle (UK) and Ecomectin 5 mg/ml Pour-on Solution for Cattle14-21 days for stomach and intestinal worms depending on species; 28 days for lungworm
Some pour-on ivermectins, such as Enovex 0.5% w/v pour-on solution for cattle, Ivomec classic pour-on for cattle0-21 days for stomach and intestinal worms depending on species; 28 days for lungworm
Some injectible ivermectin products, such as Ivomec classic injection for sheep and cattle, Norofas solution for injection14-21 days for stomach and intestinal worms depending on species; 28 days for lungworm
Some injectable ivermectin products, such as Ecomectin 10 mg/ml Solution for Injection and Qualimec 10mg/ml Solution for Injection7-14 days for stomach and intestinal worms depending on species; 28 days for lungworm
Pour-on moxidection, such as Cydectin 0.5% pour-on for cattle and Zermex 0.5% w/v Pour-On Solution for Cattle5 weeks for Ostertagia ostertagi and 6 weeks for lungworm
Injectible moxidectin, such as Cydectin 10% LA for cattle and Zermex 100 mg/ml LA Solution for Injection for Cattle90 to 150 days for stomach and intestinal worms depending on species, 120 days for lungworm
Injectible doramectin, such as Dectomax 10 mg/ml Solution for Injection for Cattle and Sheep21 to 35 days for stomach and intestinal worms depending on species, 35 days for lungworm
Pour-on doramectin, such as Dectomax 5 mg/ml Pour-On Solution for Cattle21 to 35 days for stomach and intestinal worms depending on species, 42 days for lungworm
Pour-on eprinomectin products, such as EPRINEX Pour-On for Beef and Dairy Cattle and Eprizero 5mg/ml Pour-On Solution for Beef and Dairy Cattle14-21 days for stomach and intestinal worms depending on species; 28 days for lungworm

For a fuller list of products, please consult http://www.vmd.defra.gov.uk/ProductInformationDatabase or the COWS website at http://www.cattleparasites.org.uk.

Katrina Henderson, katrina.henderson@sac.co.uk

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