What it does
Red stripe causes formation of lesions on leaves.
Why and where it occurs
The disease usually occurs when the plants reach the reproductive stage, starting from the panicle initiation. High temperature, high relative humidity, high leaf wetness and high nitrogen supply favor disease development.
Red stripe of rice is common in Indonesia, Malaysia, Philippines, Thailand and Vietnam.
How to identify
Plants infected with red stripe have the following symptoms:
- Initial symptoms are pin-sized lesions, often yellow green to light orange
- Older lesions appear as orange spots with an upward stripe, which advances towards the tip of the leaves
- Lesions become necrotic and coalesce forming a blight appearance on the leaves
- Lesions more common on the leaves and less common on the sheaths
The disease can be confused with orange leaf blight disease. It is hardly distinguishable from the bacterial leaf blight disease at severe and advanced stage of disease development.
To confirm red stripe, check the shape, size and color of lesions. An advanced lesion is characterized by an orange spot with a stripe, which advances towards the tip of the leaf.
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How to manage
- Use resistant variety
- Apply nitrogen based on actual crop requirements
- Ensure optimum seeding rate and wider plant spacing also appear to reduce the disease
- Ensure intermittent drainage during panicle initiation
- Use benzimidazole fungicides (benomyl, carbendazim, and thiophanate methyl) to treat seeds
Learn more
View full fact sheet: Red stripe on IRRI Rice Knowledge Bank