Pests of Arecanut

Major pests of Arecanut are:-

1.Spindle bug: Carvalhoia arecae

Arecanut spindle bug

Symptom of the damage:

  • Sap sucking bug – damage the unopened spindle leaf
  • Inhabit the inner most leaf axils, usually below the spindle.
  • Suck the sap from tender leaflets and spindle
  • Severe infestation – blackish brown linear lesions on the spindle leaf
  • Stunted growth and twisted
  • Leaves become dried and shed

Identification of the pest:

  • Nymphs – light violet brown, greenish yellow with border of the body
  • Adult – brightly coloured red and black.

Management:

  • Spray application of dimethoate 0.05%
  • Filling the inner most leaf axils
  • phorate 10% G (10g/palm)

 

2.Cholam or white mite: Oligonychus indicus

White mite

Symptom of damage:

  • Adults and nymphs presence on the lower surface of leaves.
  • The colony is found under white webs.
  • Feed on lower surface of arecanut leaves.

Management:

  • Removal of heavily infested and dried leaves and burning
  • Spraying under surfaces of leaves and crown with Dicofol (2 ml/litre) or Rogor (1.5 ml/litre)
  • Repeat spraying at an interval of 15-20 days

 

3.Root grub:  Leucopholis burmeisteri

Arecanut root grub

Symptom of damage:

  • Grubs feed on growing roots
  • Infested palms show a sickly appearance
  • Yellowing of leaves
  • Tapering of stem and reduction in yield.

Identification of the pest

  • Adult beetle is chestnut brown in colour.

Management:

  • Collection and destruction of adult beetles
  • Digging and forking of the soil
  • Addition of organic amendments and anti-feedants (neem, pongamia and oilcake)
  • Application of phorate (Thimet 10G) @ 15g per palm give effective control
  • Soil application of phorate around the plant twice a year
    • Before onset of southeast monsoon (May)
  • After the monsoon (Sep-October)
  • In severely infected gardens, the soil should be drenched with eco-friendly insecticides

 

4.Inflorescence caterpillar: Tirathaba mundella

inflorescence caterpillar

Symptom of damage:

  • Caterpillars feed on the inflorescences (tender female flowers) and rachillae
  • Webbing and feeding the inflorescence
  • Spathe opening is delayed.
  • Yellowing of spadices,
  • Presence of small holes with frass and drying on the spathe

Management:

  • Infected spadices may be forced open and sprayed with malathion 0.05%

 

 

Source-

  • TamilNadu Agritech Portal
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