Mango stem boror (Bactrocera rufomaculata , cermbycidae, coleoptera)

• Mango, jackfruit, Apple ,
• Polyphagous

Damaging stage:- Grub(inside stem parts) Adult (twing and petiole)

Damaging symptom :- Zigzag burrowing beneath the bark and tunnel into the trunk of main stem, moving upward and feed internal tissue , Grub reaching to tap wood . Infested stem die.

Identification :-

• Egg:- Brownish white egg , on barks or in crevices in the trunk ( egg laying time :- July –august )
• Larva :- yellowish white .
• Pupa :- inside the trunk .
• Adult :-
  • long antennae ,reaching to at least end of the body .
  • Dirty yellowish spot on elytra .
  • Head is arge , prominent eye , protonum with two crescent orange yellow spot

Life cycle

Egg—1-2 week—> Grub—3-6 months—> Pupa —4-6 months–> Adult

Management :-

• loose bark and dry braches from tree
• insert long wire into the hole on the tree to kill the larva and pupa inside .
• Inject 5 ml kerosene or petrol with cotton into hole and close the hole with mud .
• Imidaclopride 8% sl @ 1ml/L of water, thiomethoxame 25% WG @ 1g/L of water for 5 time starting from 2^nd week of asar (july ) at 15 day interval.