Bunchy top of banana

SHORT NOTES FOR UG

1. BUNCHY TOP OF BANANA
Dr. V. RAMESH
Assistant Professor & Head
Department of Botany
Vivekananda College
Tiruvedakam West –625 234
[email protected]
[phone]

2. BUNCHY TOP OF BANANA
INTRODUCTION
It is a viral disease. Most serious diseases of banana.
The infected plant has a rosette like bunch of leaves at the apex.
This disease was first reported in fiji Island.
In India it is common in Karnataka, AP, Orissa, Kerala, Tamil Nadu etc.
In Tamil Nadu, it is most prevalent in Viruppatchi, a hill station in
Didigul.

4. HOST PLANT: Musa paradisiyaka
CAUSAL ORGANISMS or PATHOGEN
Bunchy top Virus or Banana Virus –I or Musa Virus –I
This virus is isometric, 18-22 nm, circular,
Simple stranded DNA,
Vector of this virus is Insect..
BBTV is the sole member of the genusBabuvirusin the family
Nanoviridae [Banana Bunchy Top Virus (BBTV)]

5. SYMPTOMS
Musa virus affect banana plant at any stage
Leaves become bunched together at the apex to form rosette.
Appearance of irregular, brown streaks along the secondary vein is the
first symptoms.
Brown streak also appear on petiole.
Leaf become smaller and narrow.
Leaves are clustered.
Infected plant shows dwarf shoots.
Fruits are not Produced.
Finally become decay.

6. ROSSETTE STRUCTURE
DECAYING OF PLANTSDECAYING OF LEAVES

7. CONTROL MEASURES:
The affected plants should be pull out and destroyed by burning.
The infected plants should be killed by pouring of kerosene over each plants.
Virus particle can be killed by spraying herbicides such as Agrokone or
MCPA or 24D (24D -2,4 –Dichlorophenoxy Acetic Acid) ,
(MCPA –2-Methyl –1-4 Chlorophenoxy Acetic Acid)
Disease free suckers or certified virus free tubers should be used for Planting.
Strict control on the entry of banana plants from other or inside states
must be checked for infection.
TN Government has banned the cultivation of Viruppatchi banana (Malaivazhai)
Moreover TN Government also followed the infection check for
movement of banana from Other states.

8. THANK YOU