Dominants

Pest no :2
Common name : Oriental fruit fly, mango fruit fly.

Scientific name : Bactrocera dorsalis.

Crops damaged : Mango, banana, sapota, fig, guava, papaya, passion fruit, peach, pear, pineapple, roseapple, citrus, coffee, etc.

Identification characteristics of pest :

Egg - A single female lays 150 - 200 eggs in a month.2 - 15 eggs laid in clusters just below the fruit epidermis about 4mm depth.

Larva - Yellowish apodous maggots on hatching from egg starts feeding.

Pupa - Takes place in the soil after fruit falls down.

Adult - Light brown with transparent wing.Thorax ferrugineous or rusty colour without middle yellow stripes.Legs yellow and abdomen conical and dark brown .

Damage symptoms by pest:

Maggot bore into semi-ripen fruits with decayed spots leads to dropping of fruits.Oozing of fluid takes place during severity.Brownish rotten patches on fruits can be seen.

Management of pest :

Collection and disposal of infested fallen fruits and by dumping in a pit.summer ploughing to expose the pupa.Monitoring the activity of flies with methyl eugenol s*x lure traps.Field release of natural enemies Opius compensates and Spalangia philippines.Baiting any one of the insecticides like malathion 50EC 2 ml/l, dimethoate 30 EC 1 ml/l, carbaryl 50 WP 4 g/l and molasses or jaggery 10 g/l, 2 rounds at 2 weeks interval before ripening of fruits.

(*ICAR - Pupation takes place in soil.Hibernation of pupa takes place during winter in North India.)