Youssef, A. (2002). ECOLOGICAL STUDIES ON DATE PALM SCALE INSECT, Parlatoria· blanchardi Targ., ON TWO DATE PALM VARIETIES AT KAFR EL-SHEIKH GOVERNORATE. Journal of Plant Protection and Pathology, 27(2), 1291-1299. doi: 10.21608/jppp.2002.253403
Asmhan E. Youssef. "ECOLOGICAL STUDIES ON DATE PALM SCALE INSECT, Parlatoria· blanchardi Targ., ON TWO DATE PALM VARIETIES AT KAFR EL-SHEIKH GOVERNORATE". Journal of Plant Protection and Pathology, 27, 2, 2002, 1291-1299. doi: 10.21608/jppp.2002.253403
Youssef, A. (2002). 'ECOLOGICAL STUDIES ON DATE PALM SCALE INSECT, Parlatoria· blanchardi Targ., ON TWO DATE PALM VARIETIES AT KAFR EL-SHEIKH GOVERNORATE', Journal of Plant Protection and Pathology, 27(2), pp. 1291-1299. doi: 10.21608/jppp.2002.253403
Youssef, A. ECOLOGICAL STUDIES ON DATE PALM SCALE INSECT, Parlatoria· blanchardi Targ., ON TWO DATE PALM VARIETIES AT KAFR EL-SHEIKH GOVERNORATE. Journal of Plant Protection and Pathology, 2002; 27(2): 1291-1299. doi: 10.21608/jppp.2002.253403
ECOLOGICAL STUDIES ON DATE PALM SCALE INSECT, Parlatoria· blanchardi Targ., ON TWO DATE PALM VARIETIES AT KAFR EL-SHEIKH GOVERNORATE
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.
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