SURVEY AND DYNAMICS OF NATURAL ENEMIES OF THE MEDITERRANEAN BLACK SCALE, SAISSETIA OLEAE (HOMOPTERA: COCCIDAE) IN EGYPT

Document Type : Original Article

Authors

1 Plant Protection Research Institute, Agricultural Research Centre, Dokki, Giza, Egypt

2 Department of Plant Protection, Faculty of Agriculture, Moshtohor, Zagazig University, Benha branch, Egypt

Abstract

Twenty nine natural enemies were associated to this pest (11 parasitoids and 18 predators). Population dynamics of recorded five hymenopterus parasitoids [i.e. Metaphycus bartletti Annecke & Mynhardt, M. ilavus (Howard), Microterys (lavas (Howard), Di­versinervus elegans (Silvestri) and Scutellista cyaneae (Mots.)) were studied in a Northern Coast site during 1998-1999 and 1999­2000. M. bartletti was the most effective parasitoid of Saissetia Wen on olive trees with maximum rates of parasitism of 23.0 and 24.5% during 1998-1999 and 1999-2000, respectively. The population dynamics of 6 predators were studied at the same site. Two peaks were recorded annually for Chilocorus bi­pustulatus L., Chrysoperla carneae (Stephens), Coccinella un­decimpunctate (L.), Orius sp., and Scymnus syriacus Mars. Ex­ochomus flavipes Thrum and Orius sp., were recorded at low populations throughout the two considered years, respectively.