This document provides information on several pests that affect legume crops. It describes the gram pod borer moth, its markings, size, and that the larvae feed inside pods. It also discusses the bean aphid, its small size, rapid reproduction, and that it sucks plant sap weakening crops. The legume flower thrips is introduced, with details on its damage causing flower and pod shedding. Management options are also briefly mentioned.

3. Gram pod
borer

4. Adult – moth is stoutly built and is yellowish brown.
There is a dark speck and a dark area near the outer margin of
each forewing.
The forewings are marked with greyish wavy lines and black
spots of varying size on the upper side.
Hind wings are whitish and lighter in colour with a broad
blackish band the outer margin.
length – 3.5cm

6.  The female lay eggs singly on tender parts of the
plants.
 A single female may lay as many as 741 eggs in 4
days.
 They hatch in 2-4 days in April – Oct. and 6 days in
Feb. and young larvae feed on the foliage for some
times and later bore into the pods and feed on the
developing grains with their bodies handing out side .
 They move from pod to pod full fed in 13-19 days
and measure 35mm in the last instar.

7.  The full grown larvae come out of the pod and pupate in the
soil.
 The pupa is dark brown and has a sharp spine at the
posterior end. in active season the papal lasts 8-15 days
 There may be as many as 8 generation in a year.
 The caterpillar feed on their follow if suitable vegetation is
not available.
CONT…..

8.  Scientific name – Aphis craccivora
 Order – Hemiptera
 Family- Aphididae
Host range – groundnut, redgram, peans, safflower,
lablab, niger
Bean aphid

9. Both nymph and adult cause the damage by sucking the plant
sap.

Infested pods become de-shaped withered and malformed.
Severe infestation may result in complete drying of affected
pods.
They also act as vector of pea virus.
Damage and symptoms

11. It is a greenish black coloured aphid .
the total life cycle occupies an average of 3-8
days.
It reproduces parthogenetically and
viviparously.
the female may produce 8-30 days young
ones in a life span of 10-12 days.
The nymphs transfer into adult in 5-8 days
after passing through four instar.


12. Management

13. White fly

14. Damage symptoms
 The damage is caused by nymphs and
adult which are found in large numbers.
 They suck plant sap and lower its viability.
 Severe infestation result in pre mature
defoliation development of sooty mould or
honey dew and shedding of flower and
pods.

16.  Grow resistant variety
 Spray the infested crop Dimethate 30EC
750ml in 700-800 L water/ha.
Managements

17. Scientific name - Maruca
testulalis
Order - lepidoptera
Family- pyralidae

18.  The pest is wide spread in tropical and subtropical
region of the world.
 It is an important pest of cowpea green gram, red
gram, soybean etc.
 The moth has a while cross band on the dark brown
forewings and a dark border on the while hind wings
 The larva is green with a brown head, short dark hairs
and black works on the body.
Introduction

19.  The eggs are laid singly in the flowers or buds or on
the host plants.
 After hatching the young caterpillar enters the buds,
flower on the pods.
 It feeds on the seed within pods.
 It pupates within debris or near surface of the
ground.
 The moths shelter among lower leaves.
life cycle

20.  the larvae together the flower and feed on them
and also bore into pods and feed on the seeds
resulting in appreciable loss in yield of seeds.
managements
damage

21. Blister beetle
Scientific name – Mylabris pustulata
Order – Coleoptera
Family - Meloidae

22. Adult beetle feed voraciously on
flowers and render pods greatly
affecting pod setting.
This may have a significant impact on
yield particularly of short duration
varieties.
Damage

23.  Eggs are usually laid in the soil and the diet of the
larvae consists of other soil insects, including
major pests. Thus while the adults may cause
considerable damage the larvae are beneficial.
 The pest has been found to be active during Aug-
Oct particularly in South India.
Life cycle

24.  Manual picking and destruction of adult
beetle is quite useful.
 Spray 2 litre of Acephate 75 SP in 200-250
lit of water/hac.
Management

25. Scientific name - Exelastis atomosa
Family – Pterophoridae
Order - Lepidoptera

27. BIONOMICS

30. S.N - Ophiomyia phaseoli
FAMILY – Agromyzidae
ORDER - Diptera
Thepestattacksthecropatearlystage.Itisamajorpestofcowpea,
soybean,blackgramandgreengram.
Eggsarethrustsintotenderpartofthestem/petiole.

32.  Growing varieties like LBG-611, LBG-402 are promising
against stem fly,
 high seed rate
 seed treatment with carbosulfan @ 40g/kg seed or
thiamethoxam @ 4g/kg and
 foliar application of monocrotophos 1.6ml/l or acephate
1.5g/l are effective measures.