3. Introduction
The mango seed weevil is one of major pests of mangoes in
East Africa.
The larva, which is the damaging stage of the pest, enters the
fruit burrowing through the flesh into the seeds, where they
feed until pupation, destroying the seed.
Early attack leads to premature fruit fall. If the attacks occur at
a later stage, fruit infestation is very difficult to detect, since
there are no external signs of infestation.
4. Host:- Mango
Identification:-
Grub:- A full growth grub is legless. Fleshly and yellow with dark
head.
Dark weevil after emergence remain inactive. Hidden in the cracks
and crevices on the trunk.
Adult:- adult is a dark brown with short snout.
5.
6. Life Cycle
The egg period is 7 days.
a single fruit up to 15 eggs may be laid in a day
The larval period is 20-30 days. It undergoes five larval
instars and pupate inside the nut along the concave
side.
The pupal period is 7 days
The adult weevil is stoutly built, 6 mm long, dark brown
in colour.
The total life cycle occupies 40-50 days.
8. NOD..
Grub makes zigzag tunnel with pulp.
Eats unripe tissue and bore into cotyledons.
Fruits dropping at marble stage.
Ovipostion injuries on marble size fruit.
Tunnel cotyledons in mature fruit by grubs.
9.
10. Management
Collect and destroy the fallen fruit.
Spray application of Fenthion 100 EC 1ml/L (1st at
marble stage of the fruit 2nd at 15 days interval).
During non flowering season direct spray towards the
base of the trunk.