A quick drench check is a simple cost effective tool for keeping track of how each drench group is performing.  A drench check consists of two worm egg counts.  One worm egg count is performed before the drench and another 10-14 days post drenching. This is to check if the drench has reduced the worm egg count.  A drench is considered effective when worm egg counts are reduced by 95% or more. Worm typing (larval culture and differentiation) should be carried out to determine which species of worms are resistant to the drench you have used.

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