Studies on the lifecyc1e of aleurodicus dispersus (rusell) (homoptera: aleyrodidae) on potted cassava plant in a screen house

Abstract

The life cycle, and morphometries studies of A. dispersus (Rusell), white flies were conducted in a screen house in the Department of Zoology, University of Ibadan, Ibadan. The study revealed that A. disperses (Rusell) on cassava potted plants leaves, Manihot esculenta (Cranzt) (TMS 91934), have six stages, which include, egg first instar, secxond instar, third instar, pupa and adult. Trichoderma lignorum a fungal was identified as the cause of high mortality rate which occurred on the eggs and the intars of A. dispersus. The study was carried out under varied temperature and relative humidity of (27.20 - 30.33°C) and 68.00 - 82.33%) respectively for a period of 29 days.