Certain ecological studies on scale insect, Parlatoria blanchardi Targ. were
conducted at Baltim region, Kafr El-Sheikh Governorate on two varieties of date palm,
Hayany and Sammany. Hayany variety was found more susceptible to P. blanchardi.
The apical part and the middle part of the leaflets captured few number of insects
than those of the basal part for Hayany and Sammany varieties and insect preferred
the upper surface of leaves than the lower one. Insect had three distinct peaks during
the year of study, the highest peak was found in October, the second in March and
the smallest third one in June. Results indicate a significant decrease of total
chlorophyll content in infested leaflets by P. bl'anchardi compared with uninfested
ones. The obtained information could be help in controlling this insect pest.