The silver leaf whitefly,Bemisia tabaci biotype „B ”(Homoptera:Aleyrodidae)is one of the most serious vegetable and ornamental plants pest in Egypt.Predators play an important role in controlling this species. The present work deals with the abundance of indigenous predators in greenhouse on three host plants mostly of vegetable crops during April –July,1996.Chrysoperla carnea (Stephens)(Neuropteran: Chrysopidae)is considered the most abundant predator acting on Bemisia. In the meantime,the work deals also with the potential of the imported predators,namely Delphastus pusillus Le Conte (Coleoptera:Coccinellidae)and Macrophillus caliginosus (Wagner)(Hemip- tera :Miridae).These predators were released 3 times on eggplant (Solanum melongena)and at the ratio of 1 individual and 2 individuals/plant for D.pusillus and M.caliginosus,respectively.Results indicate that predators increased in numbers while whitefly population decreased in comparison to control homologues. Biotype B.tabaci was identified in John Innes Center,UK and recorded by Abd-Rabou (1999) in Egypt as first recorded for presence of this biotype.
Eretmocerus siphonini Viggiani and Battaglia is one of parasitoids that showed a promising trend towards control of some whitefly species. The classical biological control of Siphoninus phillyreae (Haliday) (Homoptera: Aleyrodidae) and Aleurolobus niloticus Priesner and Hosny (Homoptera: Aleyrodidae) was achieved through mass rearing and releasing of E. siphonini in three governorates in Egypt during 1998-1999. A total of 237,020 parasitoids were reared and released in Assiut, Giza and Sharqiya governorates. The rate of parasitism increased from 5 to 60% and from 21 to 65% during 1999-2000, respectively, in Assiut. In Giza governorate, the increase amounted 2 to 46 and 10 to 67% on S. phillyreae on pomegranate plant. Accordingly, E. siphonini showed that, it is an effective parasitoid legible for control of this whitefly. Similarly, the parasitism rates of E. siphonini increased (from 8 to 67% and 12 to 73 in Assiut and from 14 to 76 and 27 to 70% in Sharqiya) after releasing of the parasitoids on A. niloticus on ziziphus plants which showed the important role of this parasitoid in Egypt.
A synopsis of the species of Aphytis occurring in Egypt and comprising nine newly recorded species being A. chilensis Howard, A. hispanicus (Mercet), A. paramaculicornis DeBach and Rosen, A. vandenboschi DeBach and Rosen, A. philippinensis DeBach and Rosen, A. africanus Quednau, A. lingnanensis Compere, A. phoenicis DeBach and Rosen, A. aonidiae (Mercet) and A. libanicus Traboulsi. A key is given to these species.
The family Encyrtidae is one of the largest families among the Chalcidoidea with over 3000 nominal species known throughout the world of which thirty-eight have been recorded in Egypt (Abd-Rabou, 2006). It represents the largest group of natural enemies of soft scales (Coccidae: Hemiptera) with several hundred species in 45 genera. Prinsloo (1997) provided an excellent review and key to the genera of encyrtids associated with soft scale insects. The following represents the results of a survey of encyrtid parasitoids associated with scale insects in Egypt (Hemiptera: Cocciodea) conducted in 2009.
Three new species of Eretmocerus Haldeman, E. persiangulfus sp. n., E. aleuroviggianus sp. n. and E. hederae sp. n. are described and illustrated as well as the Iranian species list of the genus Eretmocerus is presented.
Species of the family Aphelinidae (Hymenoptera: Chalcidoidea) comprise many of the most widely used and successful entomophagous biological control agents. An annotated list of the 11 genera and 81 species of the family Aphelinidae known to occur in Egypt and a key to genera of Aphelinidae in Egypt are provided.
During an investigation of the whitefly fauna in Egypt, Pealius mori (Takahashi) was discovered infesting Euphorbia sp. in Giza, Egypt. This is the first record of the presence of this whitefly species in Egypt and on this host plant. The taxonomy, distribution, host plants, parasitoids as well as comments regarding this whitefly species are presented.
In recent years, Aleuroclava psidii (Singh) (Hemiptera: Aleyrodidae) has been extending its geographic range due to the international movement of plant material. In October 2013, it was discovered on Psidium sp. (Myrtaceae) in Egypt and represents the first record of this species in Egypt and the Western Palearctic region.
During the investigation on aphelinid materials in Iran, two undescribed species belonging to the genus
Abd-Rabou and Ghahari n.sp., a parasitoid of
Abd-Rabou and Ghahari n.sp., a parasitoid of
Danzig were recognized. This paper presents descriptions and illustrations of the new species as well as the key for the
species in Iran.