الفهرس 
Taxonomic informationOnly 14 pages are availabe for public view
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Abstract
The present investigation was carried out to follow up the
population fluctuations of the white date palm scale insect, P. blanchardii
(Targioni-Tozzetti) infesting date palm trees under the conditions of Esna
district, Luxor Governorate, A.R. of Egypt through the two successive
years (2010/2011 and 2011/2012). The obtained results of these studies
could be summarized as the follows:
1- Ecological studies:
Ecological aspects were carried out at Esna district, Luxor Governorate
were recorded during the two successive years (2010/2011 and
2011/2012). Results indicated the following:
1.1- Population fluctuations of P. blanchardii:
1.1.1- The first year (2010/2011):
1.1.1.1- Immature stages of P. blanchardii:
The study of the seasonal fluctuation of first instar nymphs was
observed. The peaks of 1st instar nymphs were recorded in the beginning
of October, mid-November, mid-April and mid-June. While, the second
instar nymphs, four peaks were recorded in mid- October, beginning of
December, beginning of May and beginning of July.