Banana
1.Rhizome weevil: Cosmopolites sordidus: Curculionidae: Coleoptera.
- Egg: Eggs are laid in small burrows, which beetle scoop
out on the root stock or within leaf sheaths.
EP: 5-8 days.
- Grub: Grub
is apodous and yellowish with reddish head.
Grub bores into rhizome and tunnels within it. It becomes full-grown in 25 days.
- Pupa: Grub pupates within chamber
made near the outer surface for 5-6 days.
- Adult: Adult tunnels within stem feeding on its internal tissues
and lives for one year.
- Death of unopened pipe, withering of outer leaves. Grubs bore into the
rhizome and cause death of the plant.
 |
| Adult weevil |
 |
| Tunneling of rhizome |
2. Pseudostem borer Odoiporus longicollis:Curculionidae:
Coleoptera.
- Egg: Eggs are thrust within air chamber in leaf sheath
through oviposition slits made by rostrum at one egg/air chamber. Eggs are laid at random on out ends of
pseudostem also. EP: 4-8 days.
- Grub: Larva apodous and last for 30-65
days with five larval instars.
- Pupa:
Grubs pupate in tunnel towards the periphery in a cocoon made from pieces of
fibrous materials of sheath. PP: 24-44
days.
- Adult: Adult is a robust reddish-brown and black weevil.
- Wilting
of the plant. Bore holes and tunnels in the pseudostem.
 |
| Adult Weevil |
 |
| Bore hole on Pseudostem |
3.Banana aphid: Pentalonia nigronervosa: Aphididae :Homoptera.
- Adult is brownish in colour and has black-veined wings.
- About 30-40 overlapping generations are completed in a year.
- It
is a vector of bunchy top viral disease. High humidity and moderate temperature
are conducive for population increase.
4. Banana skipper/ Palm red eye: Erionota thrax : Hesperidae: Lepidoptera.
- Adult: Chocolate-brown; anterior wings with three discal pale ochraceous spots.
 |
| Caterpillar with Wax coating |
 |
| Rolling of Leaves |
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