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What with? … Learn about when you should administer a quarantine drench, what to use, and importantly – what to do afterwards!  … The ‘why’ of quarantine  The aim of a quarantine drench to bought-in stock is to prevent the importation of multi-drench-resistant worms onto your property.   You probably have worms with some level of drench resistance already – but you want to ensure you don’t make this worse by importing worms with nastier genetics than the ones already there!  Bought-in lambs and …

A list of various papers on alternative options for worm control can be found at the American Consortium for Small Ruminant Parasite Control. A good local review is provided on Deer Industry New Zealand’s Deer Hub website (pages 63–74).  … A range of different ‘natural’ products, herbs and minerals are sometimes advocated as treatments or preventives for worm infections in livestock. This page is by no means a complete list. But here we review some commonly mentioned ones, and available …

What’s the story with genetics for worm management? Aren’t worm-resistant sheep poor performers? What’s the difference between resistance and resilience? Who’s CarLA (hint: It’s not your sister’s mate from Temuka). Resistant sheep have high immunity to worms and pass less worm eggs in their faeces. Resilient sheep continue to grow and perform despite worm challenge. Both traits are being measured and selected by NZ sheep breeders – you can buy rams that will improve these traits in your flock. …

What type of worm laid those eggs? Faecal egg counts tell us how many worm eggs our stock are passing. Larval cultures tell us what worm genus the eggs are from.   … Larval cultures are normally done at an animal health laboratory. Eggs are incubated and  hatched out; the resulting larvae are identified under a microscope. Larval cultures identify worms to the ‘genus’ level (not ‘species') – e.g. Trichostrongylus worms are reported as ‘Trichstrongylus’ , not ‘ T colubriformis’ or ‘ T vitrinus’ …

… The Wormwise Handbook and other B+LNZ parasite management tools, and a list of scientific literature for those who really like to delve into the detail.  Resources for farmers Wormwise handbook  (PDF, 4.3MB) – or request a printed copy Request a Wormwise workshop in your area:  Contact your B+LNZ extension manager Podcast with Dr Dave Leathwick : covering good …