Symptoms
- Larvae bore into tender terminal shoots and feed on internal tissues resulting in blackening and decaying of affected shoots.
- The pest infestation is higher during July to October when numerous succulent shoots are available in the vines
Management
- Remove the affected parts along with the larvae inside to reduce the population
- Spray neem seed kernel extract (50 gram per litre of water)
- Spray quinalphos (0.05% each) on tender terminal shoots; repeat spraying at monthly intervals (during July - October) to protect emerging new shoots.
Dept of Agriculture Development 
SFAC Kerala