Damage Symptoms
• Adults and nymphs suck cell sap from under surface of leaves and leaves turn pale yellow later shrivel up
• They also excrete honeydew on the foliage leading to sooty mould development which is reducing photosynthesis.
Management
• Clean cultivation.   
• Proper disposal of trash after harvesting to be utilized as compost or burnt.
• Detrashing of leaves from August onwards reduces pyrilla populations.
• Removal and destruction of egg-bearing sugarcane leaves at regular intervals to minimize buildup of populations.      
• Avoid Ratooning where field is heavily infested.
• Collection & Destruction of eggs & insects of all stages as far as practicable.
• Conservation of the egg parasite Tetrastichus pyrillae and Epiricania melanoleuca nymph and adult parasite in the fields.
• Collect egg masses at regular interval and kept in old cloth bags and suspended at different places in the field to facilitate selective emergence of adult egg parasitoids.
• Spraying of Chlorpyrifos 20 % EC @ 2 ml/litre or Acephate 50 % + Imidacloprid 01.80 % SP @2.5 ml/litre of water  in detrashed crop to combat emergency build up  of the pest.