Plantwise Factsheets for Farmers
Recognize the problem
The adults of the groundnut aphid (tumbu) are
shiny-black, while the young tumbu are dark brown. They are mainly found on
young leaves, stem, flowers and pegs sucking the sugar water from the plant.
The young and adult aphids suck fluid from
the young growing leaves, flowers and pegs, causing the leaves to fold. The
pest transfers a virus (a type of sickness) which causes the plant to become
stunted (small or short) resulting in loss of yield. Also, the pest produces a sugar-like
substance which turns black on the plant after sometime. Production of this black substance in large
quantity reduces food production by the groundnut, thus reducing yield further.
rosette resistant varieties, e.g. samnut 22 and samnut 23, which will hardly
get the sickness.
clean and healthy seeds for planting. They will produce stronger plants.
early between the second week in April and the second week in May for first
cropping and the first week in September for second cropping so that the plant can
start flowering before aphids appear.
close spacing planting (50 cm x 20 cm) to discourage population build-up of
aphids and reduce the problem of rosette diseases.
or rotate groundnut with maize or other cereals.
to remove alternate hosts.
fields regularly starting from two weeks after planting and check plants for the
presence of aphids and signs of the sickness (yellowing of leaves).
The recommendations in this factsheet are relevant to:
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