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Pests of soyabean
By
Dr. U. Pirithiraj, P.hD.
Assistant Professor (Entomology)
JSACAT
Affiliated to Tamil Nadu Agricultural University
Whitefly, Bemisia tabaci, Aleyrodidae, Hemiptera
1
Dr. U. Pirithiraj, P.hD. (Entomology)
Symptoms of damage
Due to attack of the insect the leaves
turn yellow and become curled.
This insect spread the mosaic disease
in soybean. Yellow bodied insects with white wings
Wide distribution, Origin in Uganda, to the northern,
central, eastern and coastal regions of Tanzania
Leaf hopper, Orosius sp., Cicadellidae, Hemiptera
2
Dr. U. Pirithiraj, P.hD. (Entomology)
Infested leaves start yellowing from the margins
Sailor butterfly, Neptis jumbha, Nymphalidae,
Lepidoptera
3
Dr. U. Pirithiraj, P.hD. (Entomology)
Egg is globular,
with hexagonal
pits
caterpillar has longer
subdorsal spines on
the 3rd thoracic
segment
Adult is black with
white patterns in
wings
Pupa attaches
itself via a
cremaster
Symptoms
Defoliation
Distribution. The species is found in southern India, the Nilgiris the Western Ghats,
northeast India, Myanmar, the Andaman Islands and Sri Lanka.
Pod fly, Melanagromyza obtusa, Agromyzidae,
Diptera
Nature of damage
• Young maggot attaches itself on the
immature seed inside the pod.
• In the beginning it feeds on the surface
• Later mines into seeds and makes
galleries
• One seed is enough for the development of
a maggot.
4
Dr. U. Pirithiraj, P.hD. (Entomology)
India, Indonesia, and Malaysia
Symptom of damage
• Shriveled pods and seeds.
• Damaged seeds become unfit for consumption
and also do not germinate.
• However, the attack of the fly remains
unnoticed by the farmers due to the concealed
mode of life of this insect within the pods.
Dr. U. Pirithiraj, P.hD. (Entomology)
Freshly laid eggs are white, broad and
round at its posterior end which is
embedded in the tissues of the pod and
narrowed anteriorly into a somewhat
elongated egg sheath.
Freshly hatched maggot is white
Full-grown maggot is cylindrical in
shape and is narrower at the head end,
which bears black mouthparts.
Dr. U. Pirithiraj, P.hD. (Entomology)
Pupation takes place in hard
chitinous puparium, which is
found sticking to the side of pod.
Abdomen is glossy black,
but in some cases it is slight
bronzy, while in other cases
it has a greenish-blue
background.
Management
Conserve natural enemies like Euderus
lividus, Eurytoma sp., Euderus
agromyzae
Euderus spp. Eurytoma sp.
Dr. U. Pirithiraj, P.hD. (Entomology)
Leaf miner/ Surul poochi/ soybean leaf miner,
Aproaerema modicella, Gelechiidae, Lepidoptera
5
Nature of damage
Minute larvae mine into the leaves
Later they web several leaves together
Symptom of damage
Brown blotches in midrib
terminal leaflets with white patches
webbed together
distorted and finally get dried up
Indonesia (Java) and India
Management
ETL: 1 larvae/meter row
•Set up light traps @ 1/ha
•Apply anyone of the following insecticides
• Dimethoate 30 EC 660 ml/ha
• Methyl demeton 25% EC 1000 ml/ha Dark brown moth
Laid on the leaves and shoots Small, green in colour with dark head and prothorax

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Pests of soyabean_Binomics_IdentificationDr.UPR.pdf

  • 1. Pests of soyabean By Dr. U. Pirithiraj, P.hD. Assistant Professor (Entomology) JSACAT Affiliated to Tamil Nadu Agricultural University
  • 2. Whitefly, Bemisia tabaci, Aleyrodidae, Hemiptera 1 Dr. U. Pirithiraj, P.hD. (Entomology) Symptoms of damage Due to attack of the insect the leaves turn yellow and become curled. This insect spread the mosaic disease in soybean. Yellow bodied insects with white wings Wide distribution, Origin in Uganda, to the northern, central, eastern and coastal regions of Tanzania
  • 3. Leaf hopper, Orosius sp., Cicadellidae, Hemiptera 2 Dr. U. Pirithiraj, P.hD. (Entomology) Infested leaves start yellowing from the margins
  • 4. Sailor butterfly, Neptis jumbha, Nymphalidae, Lepidoptera 3 Dr. U. Pirithiraj, P.hD. (Entomology) Egg is globular, with hexagonal pits caterpillar has longer subdorsal spines on the 3rd thoracic segment Adult is black with white patterns in wings Pupa attaches itself via a cremaster Symptoms Defoliation Distribution. The species is found in southern India, the Nilgiris the Western Ghats, northeast India, Myanmar, the Andaman Islands and Sri Lanka.
  • 5. Pod fly, Melanagromyza obtusa, Agromyzidae, Diptera Nature of damage • Young maggot attaches itself on the immature seed inside the pod. • In the beginning it feeds on the surface • Later mines into seeds and makes galleries • One seed is enough for the development of a maggot. 4 Dr. U. Pirithiraj, P.hD. (Entomology) India, Indonesia, and Malaysia
  • 6. Symptom of damage • Shriveled pods and seeds. • Damaged seeds become unfit for consumption and also do not germinate. • However, the attack of the fly remains unnoticed by the farmers due to the concealed mode of life of this insect within the pods. Dr. U. Pirithiraj, P.hD. (Entomology)
  • 7. Freshly laid eggs are white, broad and round at its posterior end which is embedded in the tissues of the pod and narrowed anteriorly into a somewhat elongated egg sheath. Freshly hatched maggot is white Full-grown maggot is cylindrical in shape and is narrower at the head end, which bears black mouthparts. Dr. U. Pirithiraj, P.hD. (Entomology)
  • 8. Pupation takes place in hard chitinous puparium, which is found sticking to the side of pod. Abdomen is glossy black, but in some cases it is slight bronzy, while in other cases it has a greenish-blue background. Management Conserve natural enemies like Euderus lividus, Eurytoma sp., Euderus agromyzae Euderus spp. Eurytoma sp. Dr. U. Pirithiraj, P.hD. (Entomology)
  • 9. Leaf miner/ Surul poochi/ soybean leaf miner, Aproaerema modicella, Gelechiidae, Lepidoptera 5 Nature of damage Minute larvae mine into the leaves Later they web several leaves together Symptom of damage Brown blotches in midrib terminal leaflets with white patches webbed together distorted and finally get dried up Indonesia (Java) and India
  • 10. Management ETL: 1 larvae/meter row •Set up light traps @ 1/ha •Apply anyone of the following insecticides • Dimethoate 30 EC 660 ml/ha • Methyl demeton 25% EC 1000 ml/ha Dark brown moth Laid on the leaves and shoots Small, green in colour with dark head and prothorax