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PESTS OF CASTOR :: Minor Pests :: White Fly

11.  White fly: Trialeurodes ricini (Aleyrodidae: Hemiptera)


Damage symptoms: Water soaked spots on the leaves which become yellow and dried.  Colonies of whitefly are found on the under surface of leaves.



Bionomics: The adults are pale yellow with white wings covered with waxy powder.  It lays eggs in clusters on the under surface of leaves.  Nymphal stage undergoes four instars.  The life cycle is completed in 19-21 days during July-September.