WHAT’S NEW
Introducing Norshield® 45WG New Technology from Europe Grochem launches a new generation copper formulation to the Apple market.
Developed in Europe and manufactured in Norway by Nordox to meet tough new regulatory standards, Norshield 45WG is now a leading copper product in France, Italy and Spain showcasing low use rates and international organic certification. Norshield 45WG has superior rain fastness and is BioGro approved for Organic crop use in New Zealand.
However, scientists found the new formulation had crop enhancement properties. What they discovered was Norshield 45WG activated the plant’s own defense systems through inducing resistance and using the plant’s natural pathways, providing disease control beyond the contact zone of applied product.
Norshield 45WG contains 450g/kg Cuprous Oxide and is registered for use on apples for canker control, reducing copper use rates by 33%, while maintaining the same level of efficacy under extreme disease pressure situations.
This was demonstrated in a laboratory by treating grape leaves in only one zone, on the underside of the leaf, then inoculating the leaf with downy mildew. Efficacy comparisons were made alongside other commonly used copper fungicides and tested for disease control outside of the area treated.
Why the change? Norshield 45WG has more activity per gram of copper thanks to a new improved formulation and reduced particle size. This has shown to have better disease efficacy at lower use rates of active copper per hectare. New label rates and crops are to be added in the future as more trial work is completed in New Zealand.
The trial results opposite show in red the treatment area and the level of control by each copper product in the untreated zones. This trial illustrates how Norshield 45WG induces resistance using the plant’s natural pathways after being applied to a single point on the leaf surface.
Severity 7 days after inoculation
Effect of the treatments – NORSHIELD has increased efficacy at the same rate of copper... Norshield is available in a 10kg bucket from your local horticultural merchant.
To learn more about Norshield please call your local technical advisor, Grochem representative or visit www.grochem.com. The ORCHARDIST : APRIL 2021 69
