Pests of Papaya

Papaya is one of the important quick growing fruit crops. There are some major pests that can cause damage and spoil the production.For the protection of papaya, proper identification and management of pests should be adopted.

Major pests of Papaya are:-

1.WhiteflyBemisia tabaci 

whitefly

Symptoms of damage:

  • Nymphs and adults suck the sap from undersurface of the leaves
  • Yellowing of leaves.

Identification of pest:

  • Egg – pear shaped, light yellowish
  • Nymph – Oval, scale-like, greenish white
  • Settle down on a succulent part of leaves.
  • Adult – White, tiny, scale-like adults.

Management:

  • Field sanitation
  • Removal of host plants
  • Installation of yellow sticky traps
  • Spray application of imidacloprid 200SL at 0.01% or triazophos 40EC at 0.06% during heavy infestation.
  • Spray neem oil 3% or NSKE 5%
  • Release of predators viz., Coccinellid predator, Cryptolaemus montrouzieri
  • Release of parasitoids viz., Encarsia haitierrsis and E.guadeloupae

 

2.Fruit fly: Bactrocera (Dacus) dorsalis

fruit fly

Symptoms of damage:

  • Maggots puncture into semi-ripe fruits with decayed spots
  • Oozing of fluid and brownish rotten patches on fruits.
  • Dropping of fruits.

Identification of pest:

  • Egg – pear shaped, light yellowish
  • Nymph – Oval, scale-like, greenish white
  • Settle down on a succulent part of leaves.
  • Adult – White, tiny, scale-like adults.

Management:

  • Collect fallen infested fruits and dispose of them by dumping in a pit and covering with soil.
  • Provide summer ploughing to expose the pupa
  • Monitor the activity of flies with methyl eugenol sex lure traps.
  • Heavy application of dust and sprays of pyrethrum or BHC
  • Spray fenthion 100 EC 2 ml/ lit or Malathion 50 EC 2ml/lit.
  • Field release of natural enemies Opius compensates and Spalangia philippines

Note

  • Prepare bait with methyl eugenol 1% solution mixed with malathion 0.1%.
  • Take 10 ml of this mixture per trap and keep them in 25 different places in one hectare between 6 a.m. and 8 a.m.
  • 250 ml capacity wide mouthed bottle fitted with the hanging device at its neck.
  • Change the solution at a fortnightly interval from March to July.

 

3.Ash weevils: Myllocerus spp

Ash weevils

Symptoms of damage:

  • Grub feed on the roots
  • Wilting of young saplings
  • notching of leaf margin by adults

Identification of pest:

  • Grub – small, apodous
  • Adult – greenish white with dark lines on elytra

Management:

  • Collect and destroy the adults
  • Spray carbaryl 50 WP at 2g/lit

 

4.Green peach aphid: Myzus persicae

Symptoms of damage:

  • Nymphs and adults suck the sap from leaves, petioles and fruits
  • Leaf curling and falling
  • Premature fruit drop

Identification of pest:

  • Adult: Dark brown to chocolate brown colour

Management:

  • Remove and destroy damaged plant parts
  • Spray dimethoate 0.03% or methyl demeton 0.025%
  • Field release of parasitoid Aphelinus mali and predators,Coccinella septumpunctata

 

 

Source-

  • TamilNadu Agritech Portal