Talius – Proquinazide
Talius a common mildewicide has received off label approval for outdoor use on ornamentals and Christmas trees. Details can be found on the Teagasc pesticide blog
Recently withdrawn products
A large number of pesticides have had their registration revoked in the last 2 months (e.g. CeCeCe 750, Stroby,Topple 10, Winger etc.). More will lapse by the end of September (Basta, Nettel Ban, Pistol etc.) There is a full list available here (pdf) or on the PRCD web site.
Fungicide and Insecticide Resistance Strategy
As mentioned in previous bulletins it is important to rotate/alternate the mode of action of pesticides used, to prevent build of resistance. I have heard on a couple of occasions this summer of growers having difficulty controlling aphids and repeatedly using the same insecticide on them! This approach is sure to cause long term challenges.
- Avoid using the same chemical mode of action twice in a row
- Pesticides containing 2 modes of action are less likely to develop resistance
- Physical mode of action is very unlikely to develop resistance and can be used repeatedly e.g. oils or soaps
Fungicide Resistance Action Committee FRAC pdf list of categories
Insecticide Resistance Action Committee IRAC categories: pdf list, searchable web site or downloadable app
Either pdf list can easily be searched by pressing Ctrl + F and typing the active ingredient you are searching for.
IRAC Video: Insecticide Mode of Action Explained
An animated and diagrammatic explanation of the importance of mode of action as the basis for effective and sustainable resistance management.
