The document discusses Papaya leaf curl virus, a disease that affects papaya plants causing leaf curling and thickening of veins, which can lead to defoliation and stunted growth. The virus is transmitted by the silverleaf whitefly and can also spread through infected seeds, seedlings, and grafting material. Management strategies include removing and destroying infected plants, controlling the whitefly vector through insecticide sprays, and applying systemic insecticides to the soil.

1. THENI
PAPAYA LEAF CURL
Student Course Teacher
Jagadeesh. P Dr. Parthasarathy. S
(2015021051) Asst. Prof. (Plant Pathology)
COLLEGE OF AGRICULUTRAL TECHNOLOGY
Affiliated To Tamilnadu Agricultural University - Coimbatore

2. PAPAYA LEAF CURL VIRUS
Host: Carica papaya L. (papaya)
Disease name: Papaya leaf curl
Pathogen name: Papaya leaf curl virus (PLCV)
 Papaya leaf curl was first reported in Tamil
Nadu in 1939.

3. Systematic position
Domain : Virus ( DNA virus)
Family Geminiviridae
Genus : Begomovirus
Species : Papaya leaf curl virus

4. SYMPTOMS
• The most prominent symptoms are the rolling
of the leaves downward and inward in the form
of an inverted cup and the thickening of veins.
• Sometimes all the leaves at the top of the
plant are affected by these symptoms.
• In advanced stages of the disease, defoliation
takes place and the growth of the plant is
arrested.

5. • The production of flower and fruits are
compromised.
• Fruits will be detorated in shape and fall
immaturely.

6. PLCV Affected plant
© APS

7. Mode of spread
 Vector: Silverleaf whitefly (Bemisia tabaci).
 Infected seeds, seedling and grafting material.
© IARC

8. Prevention
 Immediately after the disease is noticed, the
plant must be uprooted and destroyed.
 Avoid growing alternative hosts such as
tomato and tobacco near papaya.
 Spray insecticides for vector control.

9. Management
Biological:
• Spray 1% oil emulsion.
Chemical:
• Soil application of Carbofuran (1 kg a.i. /ha) at
the time of sowing.
• 4-5 foliar sprays of Dimethoate (0.05%) or
Metasystox (0.02%) or Nuvacron (0.05%) at
an interval of 10 days effectively controls the
whitefly population.

10. Reference
• https://plantix.net/plant-
disease/en/200016/papaya-leaf-curl-virus/
• https://www.apsnet.org/publications/imageresourc
es/Pages/fi00176.aspx
• https://en.m.wikipedia.org/wiki/Papaya_leaf_curl_
virus
• R.S Singh, Plant Disease, 9th Edition, Oxford IBH
Publication Co-Pvt .Ltd New Delhi page no: 541
• Ashok Aggarwal, R.S Mehrotra, Plant Pathology
3rd Edition, MC Graw Hill edu,.Pvt.Ltd Chennai
Page no : 766