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Crop Protection :: Pests of Aonla

Leaf roller Caloptilia (=Gracillaria) acidula

Symptoms of damage
  • Slender green larvae mine part or whole of the leaflets of compound leaves
  • Leaflets turns pale brown or dark brown
  • Upper epidermis separated from the lower
  • Intervening space filled with black excreta
  • Folded portion is skeletonized & dries up
  • In severe attack, the leaflets are twisted up to form cocoons
  • If the branch disturbed, all larvae leave their mines

Identification of pest
  • Larva – cylindrical, yellow with thin, scattered hairs
  • Adult – small, brownish moth

Management
  • Clean cultivation
  • Collection and destruction of infested plant parts along with leaf roller
  • Spray application of dimethaote 0.03% and quinalphos 0.025% were found effective against leaf roller

Fruit Borer, Deudorix isocrates 

Symptoms of damage
  • Larva bores into the fruit in different phases
  • Young larva-tender fruits
  • Grown up larva- attack matured fruits   
  • Infested tender fruits turn brown initially, and become black later
  • Matured fruits start decaying from one side, which gradually spreads all over, before they fall off
Bore holes Feeding injury

Management
  • Collection and destruction of damaged fruits
  • Remove alternate hosts-pomegranate, guava, sapota, tamarind
  • Release T. chilonis- 10 days interval -4 times
  • Inundative release ofTrichogramma chilonis @ 15 cc/ha
  • Ovipositional deterrent- Neem oil 3% or NSKE 5%
Egg laid on the stem and fruits Pupae

Fruit Piercing Moth, Othreis materna, O. fullonica and O. ancilla 

Symptoms of damage
  • Adult moth sucks the sap from fruits by making puncture

Identification of pest

Adult: Otheris materna
Larva  Male Female   

Management
  • Removal of weed plants
    1. Tinospora cardifolia
    2. Cocculus pendules
  • Destruction of fallen and decayed fruits.
  • Smoking
  • Collection of moths at evening by hand nets
  • Collection of semiloopers from the weeds and creepers
  • Use light trap
  • Destruction in kerosenised water below such light
  • Use of poison baits or carbaryl 2g/l

Bark Borer Indarbela tetraonis 

Symptoms of damage
  • Make tunnels in the main trunk and branches
  • Larvae construct loose irregular webbing of silken threads
  • Deterioration of vitality
  • Reduction in yield
Bore hole Tunneling - trunk Adult

Management
  • Keep orchard clean
  • Collect loose and damaged bark & destroy
  • Kill larvae by inserting iron spike or wire into hole
  • Spot application of fenthion in 1 lit of water

Aphid Setaphis bougainvilleae

Symptoms of damage
  • Adult moth sucks the sap from fruits by making puncture
Aphid, Setaphis bougainvilleae

Management
  • Removal of weeds
  • Field release of syrphids can control aphid population rapidly.
  • Field release of green lacewing, Chrysoperla carnea
  • Spray neem oil at 3%

Whitefly- Trialeurodes rara 

Symptoms of damage
  • Nymphs and adults suck sap from undersurface of leaves
  • Yellowing of leaves on dorsal side in patches
Adult - white fly

Management
  • Removal and destruction of alternate weed hosts
  • Use yellow pan traps
  • Spray neem seed kernel extract 5% (50 kg) and neem oil at 5 ml/l
  • Spray fish oil rosin soap 25 kg at 1 kg in 40 lit of water

Mealy Bug, Ferrisia virgata 

Symptoms of damage
  • Covers tender growing points with white mass
  • Suck the sap
  • Vitality reduced
Adult - mealy bug

Management
  • Early detection of mealy bugs - presence of ants - indicator
  • Cutting of infested twigs and leaves and burying them
  • Field release of green lace wing Chrysoperla carnea
  • Several species of ladybird beetles such as
    • Chilocorus sp.
    • Cryptolaemus montrouzieri are efficient predator



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