Diseases of horticultural crops and their management

1. COLLEGE OF AGRICULTURAL TECHNOLOGY
(Affiliated to Tamil Nadu Agricultural University, Coimbatore-3)
Kullapuram (Po),ViaVaigai D
Papaya mosaic virus
STUDENT
Miss M.P. HEMAVARSHINI
ID. No. 2015021049
COURSE TEACHER
Dr. PARTHASARATHY S
Asst. Professor (Plant Pathology)

2. Introduction
• Papaya mosaic virus (PapMV) was first
reported in papaya in 1962 together with
papaya ring spot virus.
• The viruses were differentiated in 1965 and
1967 using particle lengths and host range.

3. Taxonomic classification
Group : IV
Order : Tymovirales
Family : Alphaflexiviridae
Genus : Potex virus
Species : Papaya mosaic virus (PapMV)

4. PapMV
• It is a filamentous, flexuous rod, 530 nm in
length.
• The virus is a monopartite strand of positive
sense, single standard RNA surrounded by a
capsid made for a single viral encoded protein.

5. Occurrence and distribution
• PapMV was occur in South America and USA

6. Synonyms
• Papaya mosaic potexvirus
• Babco yellow mosaic virus
• Boussingaultia mosaic virus

7. Symptoms
• Mild leaf mosaic pattern with dark green
blister like patches.
• Later stage leaf veins show signs of clearing,
petioles are shorter and leaves curl downward.
• Plants show a moderately stunted growth.

10. Mode of spread and transmission
• Its spread from plant to plant by whitefly and
the disease transmission is through mechanical
plant injuries also.

11. Management
• Rotate with non host crops.
• Bio fungicides based on Verticillium lecanii
can also help to control the insect population.
• There is no chemical treatment for viral
infection. it is controlled through a series of
chemical products such as cypermethrin,
chlorpyriphos .

12. References
• http://www.plantwise.org
• http://agropedia.iitx.ac.in
• Dr.R.P.singh, Plant Pathology, published by
Kalyani publisher, pg.no:644-646
• R.S.Singh, Plant diseases published by oxford
and IBH publishing.pg.no:440-442

13. Thank you