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In ginger, this disease is often seen during the rainy season, in which water soaked spots appear in the collar region of the pseudostem, which expands upwards and downwards.
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The first characteristic symptom of this disease is a slight curling of the leaf margins of the lower leaves, which spreads upwards.
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Yellowing first starts from the lowest leaves and gradually progresses to the upper leaves. At a later stage, the plant shows signs of severe yellowing and wilting.
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The vascular tissues of the affected pseudostems show dark streaks. The affected pseudostem and rhizome when pressed gently extrudes milky ooze from the vascular strands.
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For its management use Kasugamycin 5% + Copper Oxychloride 46% WP @ 300 gm/acre or Streptomycin Sulphate IP 90% W/W + Tetracycline Hydrochloride IP 10% W/W @ 24 gm /acre.
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For biological control use Pseudomonas fluorescens 1 kg/acre.
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