The adult moth lays eggs in the mechanically damaged portions of the spadices (mostly caused by slug feeding) and the emerging caterpillars bore into the inside of the spadices
The caterpillars feed on the inflorescences especially the tender female flowers and rachillae
They web together the rachillae into a wet mass with silken threads and take shelter in it
Spathe opening is delayed
Yellowing of spadices and presence of small holes with frass and drying on the spathe
Management
Affected spadices may be opened and if all the female flowers have been damaged the inflorescence should be removed and burnt
Force open the inflorescence out of the enclosing spathe and spray Malathion 50 EC (2.5 ml/ litre) of water
Dept of Agriculture Development 
SFAC Kerala