IOLOGICAL STUDIES ON THE SEYCHELLES FLUTED SCALE MEALY BUG, Icerya seychellarum (WESTWOOD)ON SEEDLINGS OF MULBERRY (Mours alba L.) Under Laboratory Conditions

Document Type : Research articles.

Authors

1 Department of Economic Entomology and Pesticides, Faculty of Agriculture, Cairo University.

2 Department of Scale Insects and Mealy Bugs at Plant Protection Research Institute ARC.

Abstract

This study was suggested to determine some biological aspects
of this pest under laboratory conditions on Mulberry seedlings.
Obtained results can be summarizes as follows: The first, second
and third nymphal instars lasted for 13-48, 9-65 and 23-88 days,
respectively according to generation. Pre-ovipostion, oviposition
and post-oviposition periods were 20-49, 48-199 and 7-29 days,
respectively. Oviposition periods greatly influenced with prevailing
laboratory temperature and humidity. Pre-oviposition period was
negatively affected with temperature and vice versa for each of
oviposition period and post-oviposition period. Highest fecundity
per female recorded in the second generation whereas lowest one
took place in the first generation. The longest longevity average
occurred in first generation followed by that in the second
generation.. Incubation period averages were nearly similar in both
generations. Total life cycle completed in 217-376 days in first
generation and 180-384 in that of the second generation.

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