Banana is one of the most important fruit crops of India. In banana there are more than 15 insect pests which cause damage at different growing stages. Among them banana pseudo stem weevil, Odoiporus longicollis (Oliver) is considered as major pest causing considerable damage. This pest alone causes 10 90 per cent reduction in yield of banana.
The pest is distributed throughout banana growing states of India viz., North Eastern hills region, West Bengal, Assam, Tamil Nadu, Kerala, Andhra Pradesh, Karnataka and Gujarat. Banana cultivars such as Poovan, Karpuravalli, Nendran, Red vanana, etc. are found to be highly susceptible to this pest.
Symptoms of damage
Presence of small holes and jelly exudation on the stem indicates the grub activity inside the stem. The legless larvae are responsible for riddling of the pseudo stem and causing serious damage. As the infestation progresses the severely affected plants break or topple alone with the bunch.
Life cycle
Eggs are laid inside the air chambers of the leaf sheath through slits cut on leaf sheath. Incubation period ranges from 5-8 days. Larval period lasts for 26 days and pupal period including pre emergence resting period of adult lasts for about 20-24 days.
Integrated Pest Management Strategies
1. Weed free cultivation helps in reducing the spread of infestation.
2. Removal & destruction of older and dried leaves.
3. After harvest remove the pseudo stem and treat it with insecticide viz., carbaryl (2 g/l) to kill the egg laying weevils.
4. Collect adult weevils by using banana pseudo stem traps. These traps are of two types:
(i) Longitudinal split (30 cm length). The harvested plants. Split the pseudo stem of 30-45 cm length longitudinally into two halves and the cut portion of the stem is kept on the soil surface near the plant. Such traps @100/ha can be kept in the orchard. The traps are checked once in a week, trapped weevils are collected and destroyed.
(ii) Disc-on-stump trap. The disc-on-traps are made by cutting harvested stump pf 25 cm above the ground level and keep a 10 cm thick circular.
Extracted from AgriGold SwarnaSedyam
The pest is distributed throughout banana growing states of India viz., North Eastern hills region, West Bengal, Assam, Tamil Nadu, Kerala, Andhra Pradesh, Karnataka and Gujarat. Banana cultivars such as Poovan, Karpuravalli, Nendran, Red vanana, etc. are found to be highly susceptible to this pest.
Symptoms of damage
Presence of small holes and jelly exudation on the stem indicates the grub activity inside the stem. The legless larvae are responsible for riddling of the pseudo stem and causing serious damage. As the infestation progresses the severely affected plants break or topple alone with the bunch.
Life cycle
Eggs are laid inside the air chambers of the leaf sheath through slits cut on leaf sheath. Incubation period ranges from 5-8 days. Larval period lasts for 26 days and pupal period including pre emergence resting period of adult lasts for about 20-24 days.
Integrated Pest Management Strategies
1. Weed free cultivation helps in reducing the spread of infestation.
2. Removal & destruction of older and dried leaves.
3. After harvest remove the pseudo stem and treat it with insecticide viz., carbaryl (2 g/l) to kill the egg laying weevils.
4. Collect adult weevils by using banana pseudo stem traps. These traps are of two types:
(i) Longitudinal split (30 cm length). The harvested plants. Split the pseudo stem of 30-45 cm length longitudinally into two halves and the cut portion of the stem is kept on the soil surface near the plant. Such traps @100/ha can be kept in the orchard. The traps are checked once in a week, trapped weevils are collected and destroyed.
(ii) Disc-on-stump trap. The disc-on-traps are made by cutting harvested stump pf 25 cm above the ground level and keep a 10 cm thick circular.
Extracted from AgriGold SwarnaSedyam
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