VIRAL DISEASES

1. Rosetting – Shortening of the internodes.

2. Chlorosis – Weakening of the green color of the leaves.

3. Yellowing – Chlorosis and dominance of yellow color of the leaves.

4. Mosaic – Pale green, yellow or chlorotic areas sharply bordered by
small vines of the leaves that are often angular in appearance.

5. Mottle – Discolored areas of various rounded shapes, often diffusely bordered.

6. Leaf spots – Single or concentric rings of chlorotic or necrotic areas to large irregular patches of the leaves.

7. Vein clearing – Vein appearances of the leaves are translucent
rather than chlorotic or yellow.

8. Papaya leaf curl – Crinkling and curving of leaves with margins rolled down and inward.

Prevention

1. Control all insects that are virus carriers like aphids, white fly,
leafhopper, mealy bug, thrips and mites or insects that produce viral disease.

2. Use herbal insecticides for control of the virus carriers.

3. Remove weeds and other plants which are virus alternate host like kalabasa, sitaw and patani.

4. Rouge and bury or burn infected plants to destroy the virus source.

5. Disinfect all tools and equipment being used to cut any part of the plant after each use in every plant. Use 3% formalin / aniline solution.

6. Spray Lime sulfur one a week for 4 consecutive weeks and once a month thereafter.

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