20th April 2012
At the end of March, the first worming product for sheep to contain two broad spectrum active compounds (derquantel the new novel 5-SI group + abamectin a 3-ML group), was launched on to the UK market (Startect™ available through your Vet). This is a very important addition to our armoury of products available to deal with worm burdens and if used correctly will help us to delay the impact of anthelmintic resistance (AR) on sheep performance.
Firstly, we need to distinguish this product from our existing ‘combination products’ which contain two actives addressing different parasite types, for example fluke and roundworms or roundworms and tapeworms. This is why the product is known as a ‘dual active’ so you can make the distinction between the types of product, minimising any confusion.
Secondly, dual active wormers have the potential to delay the development of resistance to the component chemical groups. This is maximised when certain conditions are met in terms of the activity, duration and modes of action of the actives, all of which this product meets. However, there are two very important SCOPS principles that are also vital pre-requisites to ensure you gain maximum benefits from the resistance-delaying potential of a dual-active These are: