Spot form of net blotch suppression and yield of barley in response to fungicide application in the Wimmera region of Victoria, Australia

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. S...

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Bibliographic Details
Published in:Australasian plant pathology 2016-02, Vol.45 (1), p.37-43
Main Authors: McLean, Mark S., Weppler, Rob, Howlett, Barbara J., Hollaway, Grant J.
Format: Article
Language:English
Subjects:
Agriculture
Barley
Biomedical and Life Sciences
Crop growth
Crop yield
Ecology
Elongation
Entomology
Fungicides
Grain
Greenhouses
Life Sciences
Net blotch
Original Paper
Plant Pathology
Plant Sciences
Propiconazole
Seed treatments
Spot blotch
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Summary: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. Eight chemical seed treatments registered for use in barley were tested as potential low cost management options for SFNB. Four seed treatments reduced SFNB severity in the glasshouse, but none were effective in the field.
ISSN:0815-3191
1448-6032
DOI:10.1007/s13313-015-0387-y