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Crop Protection :: Pests of Wood Apple
 

Fruit borer, Deudorix isocrates

Symptoms of damage
  • Caterpillar bores into young fruits
  • Feeds on internal contents (pulp and seeds)
  • Fruit rotting and dropping

Identification of pest
  • Larvae - dark brown, short and stout, covered with short hairs
  • Adult - bluish brown butterfly
  • Female – V shaped patch on forewing
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Adult

Management
  • Collect and destroy damaged fruits
  • Clean cultivation as weed plants serve as alternate hosts
  • Endemic areas - grow less susceptible varieties
  • Adopt ETL (5 eggs/plant)
  • Cover the fruit with polythene bags when the fruits are up to 5 cm
  • Use light trap @ 1/ ha to monitor the activity of adults
  • Insecticides: malathion 50 EC 0.1% or two rounds, one at flower formation and next at fruit set.
  • Flowering stage - spray NSKE 5% or neem formulations 2 ml/1
  • Apply dimethoate 30 EC 1.5 ml/1.
  • Release Trichogramma chilonis at one lakh/acre.


Citrus butterflyPapilio demolious

Symptoms of damage
  • Caterpillar feed on the leaves
  • Defoliation

Identification of pest
  • Larvae
    • Early stage larva resembles bird dropping
    • Grown up larva – cylindrical, stout, green and brown lateral bond
    • Adult - Dark brown swallowtail butterfly with numerous yellow marking
http://www.ikisan.com/Images/cit_im_butterlarva.jpg http://www.ikisan.com/Images/cit_im_butterlarva1.jpg http://www.ikisan.com/Images/cit_im_butterfly.jpg
Young larva Grown up larva Adult

Management
  • Hand pick the larvae and destroy
  • Early stage - spraying of 1.5ml monocrotophos or 2 ml of methyl parathion per litre of water
  • Field release of parasitoids Trichogramme evanescens and Telenomus sp on eggs

Brachymeria sp on larvae and Pterolus sp. on Pupae



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