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Pasture Larval Counts
How pasture larval counts help your worm control strategy
Grazing animals such as sheep, cattle and horses spread worms through eggs passed in their droppings.
The eggs develop and hatch in the droppings, before moving onto the pasture where they are eaten. Once inside the host animal the larvae grow into adults, lay their own eggs to be passed in droppings, and the cycle continues.
Pasture larval counts measure the level of infection on a pasture. A number of things can influence this, including the type of parasite, the age of the animals grazing the pasture, the weather and how well the pasture is managed.
To carry out a pasture larval count a sample of grass from the pasture is washed to remove any larvae. The wash water is then concentrated and the residue examined under a microscope. From here the larvae are counted and the worm species accurately identified. This means you can accurately target treatment.
Your test results
When you request a pasture larval count we’ll send you a test kit. The kit includes a guide to help you interpret the results. As soon as we’ve completed the test we’ll get in touch and let you know what they are.
The test will help you decide whether treatment is necessary, the type of treatment required, when to carry out another WEC and whether you need any other control methods.