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Mosaic viral disease in cucurbits is generally spread by whitefly and aphid.
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In this disease, irregular light, dark green and yellow stripes or spots appear on the leaves.
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The leaves then curl, shrink and the veins of the leaves turn dark green or light yellow.
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The plant remains small and the fruits/ flowers seem to grow less or shed.
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Infected fruits are often deformed and discoloured, remain small and produce negligible seeds when severely infected.
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Whitefly and aphid should be controlled to prevent this disease.
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Spray Acetamiprid 20% SP @ 100 gm or Acephate 75 %SP @ 300 gm or Bifenthrin 10% EC @ 300 ml or Diphanthiuron 50%WP @ 250 gm/acre at 10-15 days interval to protect the crop from such pests.
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For biological control, spray Metarhizium @ 1 kg/acre or Bavaria bassiana @ 250 gm /acre.
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