There are two forms of groundnut rosette in Malawi
namely yellow rosette and green rosette. Infection of yellow mosaic leads to
yellow twisted and distorted leaves, while green mosaic is manifested by
mottling of younger leaves while older leaves are dark green and reduced in
size. In severe cases, both forms of mosaic lead to stunting and inability to
rosette, also known as Kadukutu, Khate, in Chichewa and Kaligwiti, Khate in
Tumbuka, is a serious disease of groundnuts which can lead to heavy losses of
up to 100% if not properly managed. Rosette is caused by a virus that is
transmitted by an aphid.
Groundnut rosette can be
planting, preferably with the first good planting rains. Late planted crop
suffers attack by aphids that transmit the viral particle.
at the correct plant spacing i.e. 75 cm between ridges and 15 cm between plant stations
for long duration varieties; 60 cm between ridges and 10 cm between stations
for short duration varieties.
resistant varieties such as “Nsinjilo”, “Chalimbana 2005”, “Chitala” and “Baka”
out and destroy infected plants by either burning or deep burying
and destroy volunteer groundnut plants from the field because they may become a
source of inoculums in the subsequent season