Managing Septoria tritici blotch disease in wheat
Changes in Septoria tritici blotch resistance to fungicides have been detected in the southern grain growing region, especially where wheat is sown into wheat stubble. Variety selection and crop rotations are essential for effective disease control.
- Distinctive black fruiting bodies on leaf lesions are a good indicator for diagnosis of Septoria tritici blotch (STB) infection.
- Long periods of leaf moisture are required for disease development.
- Early sown crops and crops sown into wheat stubbles are most likely to be infected.
- Two gene mutations in STB detected by NSW Department of Primary Industries indicate resistance to some fungicides.
- Adoption of an integrated disease management approach that includes crop rotation and, when necessary, applied fungicides is the most effective management tool.
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