Managing Spring Barley Disease Risks
Adapting your disease management programme is a key theme this season with many growers shifting to growing Spring Barley following significant autumn rainfall.
Drilling date of Spring Barley will hugely affect disease levels, with earlier drilling increasing the risk of early diseases such as Rhynchosporium and Mildew. Such crops may then require an early fungicide to reduce disease levels before the crop grows away, for example Kayak (@0.5L/ha).
Ramularia should also be considered when growing Spring Barley. Chlorothalonil currently provides the best protection against the disease, however with recent changes to regulations, the final use date (20th May 2020) is likely to arrive before the key application timing (GS39). As Ramularia is an unpredictable disease it is recommended to factor in the use of an alternative multi-site fungicide into your disease management programme. With the loss of Chlorothalonil, folpet can be applied @ 1.0-1.5L/ha to help prevent a Ramularia outbreak. In high risk Ramularia situations, application of two multi-sites (GS30 fb GS39-49) may be needed to manage the disease.
Competition for malting contracts will need to be considered as more Spring Barley is being grown this season. Nitrogen management is key to ensure correct harvest specifications are met. Growers should adapt their nutrition plan based on the end market requirements.
For the main mid to late season fungicide (GS39-49), Elatus Era is fully approved in malting Barley and is a cost-effective option for disease management. It is particularly strong on Brown rust as well as providing good control of Net Blotch and Rhynchosporium.