Transcript Module V: Diseases Caused by Virus Virtual Academy for the Semi Arid Tropics Lesson 4: Groundnut Rosette Symptoms The most destructive virus disease on groundnut.

Module V: Diseases Caused by Virus
Virtual Academy for the Semi Arid Tropics
Lesson 4: Groundnut Rosette
Symptoms
The most destructive virus
disease on groundnut in
Africa. Three types of rosette
have been recorded.
Stunted plants with chlorotic
twisted, and distorted leaflets
characterize chlorotic rosette.
Yield from early-infected
plants is severely reduced.
Course on Diseases of Groundnut
Module V: Diseases Caused by Virus
Virtual Academy for the Semi Arid Tropics
Lesson 4: Groundnut Rosette
Symptoms
Mosaic rosette is recorded only in
eastern, central, and southern Africa.
Younger leaflets show conspicuous
mosaic symptoms.
Green rosette currently occurs only in
western Africa. Symptoms resemble
those of peanut clump.
Young leaves show mild mottling.
Older leaves are dark green, reduced
in size, and show downward rolling of
leaflet margins. Plants are severely
stunted.
Course on Diseases of Groundnut
Module V: Diseases Caused by Virus
Virtual Academy for the Semi Arid Tropics
Lesson 4: Groundnut Rosette
Management
Removal of volunteer plants which are
primary source of infection.
Early sowing at high plant densities.
Timely application of aphicides to control
aphids which transmits this virus.
Course on Diseases of Groundnut
Module V: Diseases Caused by Virus
Virtual Academy for the Semi Arid Tropics
With this, the Lesson 4 on Groundnut
Rosette disease concludes.
Next, Lesson 5 is about Cowpea Mild
Mottle (CMMV) in groundnut.
Select Lesson 5 in Module V contents
Course on Diseases of Groundnut