ECOLOGICAL STUDIES ON Ceroplastes floridensis (Hemiptera: Coccidae) INFESTING TWO VARIETIES OF ORANGE TREES AT SHARKIA GOVERNORATE, EGYPT

Zaki, Aael; El-Sharkawy, Hamza; El Santeel, Fathy; Ezz, Nahla

doi:10.21608/jpd.2019.41322

ECOLOGICAL STUDIES ON Ceroplastes floridensis (Hemiptera: Coccidae) INFESTING TWO VARIETIES OF ORANGE TREES AT SHARKIA GOVERNORATE, EGYPT

Document Type : Original Article

Authors

¹ Plant Protection Research Institute, Agricultural Research Center, Zagazig, Egypt.

² Plant Production Department, Faculty of Technology and Development, Zagazig Univ., Egypt

³ Plant Production Department, Faculty of Technology and Development, Zagazig Univ., Egypt.

10.21608/jpd.2019.41322

Abstract

Ecological studies of Ceroplastes floridensis Comstock (Coccidae: Hemiptera) were carried out during two successive years (2016 and 2017) on two varieties of orange trees in Hannout village, Kafr Saqer district, Sharkia Governorate, Egypt.
The obtained results revealed that the total number of alive stages population had four peaks of activity yearly in both Baladi and Valencia orange tree varieties. The total effects of a biotic factors (Temperature °C, Relative humidity RH%, Sunshine hours and Light Intensity Lux.) under this study on the total numbers of alive stages population of the pest during the two successive years varied between positively and negatively significant in each of Baladi and Valencia Varieties, successively. The pest activity appeared by three overlapping annual generations in either the Baladi and Valencia varieties citrus trees.
Conclusively,from this results it could be concluded that the total number of stages of this insect was between three to four peaks per activity per year on both types of orange Balady and Valencia during both first and second years of the study.

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