Pea blue butterfly and Groundnut thrips

Pea blue butterfly and Groundnut thrips

7. Pea blue butterfly, Lampides boeticus (Lycaenidae: Lepidoptera)
  • Distribution: India, Myanmar, China, Japan, Europe etc.
  • Host plants: Pea, Lima bean, Hyacinth bean, Snap bean, Urd bean, moong bean, pigeon pea etc.
Damage:
  • Damage is caused by caterpillars
  • Bore in to the buds, flowers and green pods
  • Reduce the yield considerably.
Identification
  • Newly emerged larva is green with yellowish tinge, black head
  • The full grown larva is yellowish green to yellowish red.
  • Pupa is dark brown
  • Adult is a blue coloured butterfly
15.3
Life cycle
  • Eggs hatch in 4-6 days
  • The larva passes through five instars
  • larval period varies from 22-35 days
  • The pupal stage lasts for 6-7 days
  • Adult longevity is 2-5 days.
Salient features
  • Lay eggs on buds, flowers and green pods
  • Larvae feed on developing seeds
  • Five instars
  • Pupation takes place on leaves or in the infested pod itself
Management:
  • Carbaryl 0.1%
8. Groundnut thrips, Caliothrips indicus (Thripidae: Thysanoptera)
  • Host range: Peas, cowpea, Indian bean etc.
Damage:
  • Damage is caused by both nymphs and adults by feeding on cell sap
  • They lacerate the leaf surface and suck the oozing sap
  • White patches develop on the infested leaves
  • The pest is active at flowering and both the yield and viability of the seeds are reduced
  • A servere infestation results in the formation of white silvery sheens all over the leaf surface
Life cycle
  • The pest is active at flowering
  • On garden pea the pest has been recorded from germination stage till harvest
  • Life cycle is completed in 2-4 weeks
  • Several overlapping generation is a year.
Management:
  • Systemic/other insecticides with low residual toxicity recommended for other pests are also effective against this pest.
Minor pests of peas:

1.

Bihar hairy caterpillar

Spilarctia (Spilosoma) obliqua (Arctiidae: Lepidoptera)

2.

Rice army worm

Mythimna separata (Noctuidae: Lepidoptera)

3.

Tobacco caterpillar

Spodoptera litura (Noctuidae: Lepidoptera)

4.

Tussock moth

Euproctis fraterna (Lymantriidae: Lepidoptera)

5.

Tussock moth

Porthesia scintillans (Lymantriidae: Lepidoptera)

6.

Pea stem borer

Grapholita (Lasperesia) torodelta (Eucosmidae: Lepidoptera)

7.

Pea stem borer

Leguminivora (Laspeyresia) tricentra (Eucosmidae: Lipidoptera)

8.

Leaf eating beetle

Madurasia obscurella (
Chrysomelidae: Coleoptera)

9.

Gujhia weevil

Tanymecus indicus (Curculionidae: Coleoptera)

10.

Cotton whitefly

Bemisia tabaci (Aleyrodidae: Hemiptera)

11.

Leaf hoppers

Empoasca kerri motti (Cicadellidae: Hemiptera)

Empoasca binotata (Cicadellidae: Hemiptera)

12.

Sunnhemp bug

Ragmus importunitas (Miridae: Hemiptera)

13.

Coreid bug

Anoplocnemis phasiana (Coreidae: Hemiptera)

14.

Pod borers

Adisura atkinsoni Noctuidae: Lepidoptera)

Exelastis atomosa (Pterophoridae: Lepidoptera)

Maruca testulalis (Pyraustidae: Lepidoptera)



Last modified: Saturday, 3 March 2012, 6:46 AM