Sticky white fluffy patches under my sugarcane leaves with black sooty cane, what pest?

White fluffy waxy patches and small hopping insects on the leaf underside, with sticky leaves and black sooty mould and tip drying, is the Pyrilla and woolly aphid sucking pest complex on sugarcane, which builds up in warm humid weather. They suck sap and excrete honeydew that grows the black sooty mould, and the mould blocks photosynthesis, so juice quality and sugar recovery fall even where the cane survives. The good news is that natural enemies usually bring these pests down on their own if you do not disturb them. The parasitoid Epiricania for Pyrilla and predators and parasitoids of woolly aphid are very effective, so avoid blanket insecticide sprays that kill these helpers and cause the pest to flare back worse. Detrash and remove the lower dry affected leaves to reduce the pest and open the canopy. Avoid excess nitrogen and waterlogging that favour build up. Only on a severe early outbreak where natural enemies are absent, use a recommended insecticide as a spot treatment, following label dose and PHI. Confirm the pest and whether biocontrol is active in your field with your KVK or Vasantdada Sugar Institute, Pune.