White fly, Bemisia tabaci
| Symptoms of damage |
- Nymphs and adults suck the sap from undersurface of the leaves
- Yellowing of leaves.
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| 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.
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| 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
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Bactrocera (Dacus) dorsalis
| 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.
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| Larvae |
Adult |
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| Management |
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Collect fallen infested fruits and dispose them by dumping in a pit and covering with soil.
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Provide summer ploughing to expose the pupa
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Monitor the activity of flies with methyl eugenol sex lure traps.
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Heavy application of dust and sprays of pyrethrum or BHC
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Spray fenthion 100 EC 2 ml/ lit or malathion 50 EC 2ml/lit.
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Field release of natural enemies Opius compensates and Spalangia philippines
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| Note |
- Prepare bait with methyl eugenol 1% solution mixed with malathion 0.1%.
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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.
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250 ml capacity wide mouthed bottle fitted with hanging device at its neck.
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Change the solution at fortnightly interval from March to July.
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Ash weevils, Myllocerus spp
| Management |
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Collect and destroy the adults
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Dust lindane 1.3 D at 25 kg/ha to kill grubs
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Spray carbaryl 50 WP at 2g/lit
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Green peach aphid, Myzus persicae
| Identification of pest |
- Adult - Dark brown to chocolate brown colour
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| 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
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