Journal article
Spot form of net blotch suppression and yield of barley in response to fungicide application in the Wimmera region of Victoria, Australia
MS McLean, R Weppler, BJ Howlett, GJ Hollaway
Australasian Plant Pathology | SPRINGER | Published : 2016
Abstract
Spot form of net blotch (SFNB), caused by Pyrenophora teres f. maculata caused up to 25 % (0.9 t/ha) grain yield loss to barley and significant reductions in grain quality parameters such as retention (13 %), screenings (5 %) and grain weight (6 %) in the Wimmera region of Victoria during 2005–11. Spot form of net blotch was suppressed by varying degrees between experiments, seasons, and crop growth stages when foliar fungicide (propiconazole) was applied. Of single applications, treatment at the stem elongation (Z31) or flag leaf (Z39) growth stages generally provided the greatest disease suppression. Single application at tillering (Z25) or ear emergence (Z55) were generally ineffective. E..
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Funding Acknowledgements
The authors thank the Grains Research and Development Corporation and the Victorian Department of Economic Development, Jobs, Transport and Resources for support and funding. We thank Kevin Pymer at Wonwondah for providing field sites. Graham Exell, Jonathan Bretag, Peter Donaldson, Sharyn Andrews, Dennis Ward and David Hoffmann for technical assistance. We also thank Geoff Robertson (Bayer), Chemtura, Hamish Mines (Cropcare) and Neville Marra (Syngenta) for providing seed treatments. Lastly we thank Jenny Smith for assistance with data collation and statistical analyses.