SEASONAL ABUNDANCE OF THE OLEANDER APHID APHIS NERII BOYER DE FONSCOLOMBE (HOMOPTERA, APHIDIDAE) IN RELATION TO THE PRIMARY AND HYPER-PARASITOIDS ON DURANTA IN EGYPT.
Saleh, A., Gatwary, W. (2007). SEASONAL ABUNDANCE OF THE OLEANDER APHID APHIS NERII BOYER DE FONSCOLOMBE (HOMOPTERA, APHIDIDAE) IN RELATION TO THE PRIMARY AND HYPER-PARASITOIDS ON DURANTA IN EGYPT.. EKB Journal Management System, 12(2), 709-730. doi: 10.21608/jpd.2007.45053
Ahmed Saleh; Wafaa Gatwary. "SEASONAL ABUNDANCE OF THE OLEANDER APHID APHIS NERII BOYER DE FONSCOLOMBE (HOMOPTERA, APHIDIDAE) IN RELATION TO THE PRIMARY AND HYPER-PARASITOIDS ON DURANTA IN EGYPT.". EKB Journal Management System, 12, 2, 2007, 709-730. doi: 10.21608/jpd.2007.45053
Saleh, A., Gatwary, W. (2007). 'SEASONAL ABUNDANCE OF THE OLEANDER APHID APHIS NERII BOYER DE FONSCOLOMBE (HOMOPTERA, APHIDIDAE) IN RELATION TO THE PRIMARY AND HYPER-PARASITOIDS ON DURANTA IN EGYPT.', EKB Journal Management System, 12(2), pp. 709-730. doi: 10.21608/jpd.2007.45053
Saleh, A., Gatwary, W. SEASONAL ABUNDANCE OF THE OLEANDER APHID APHIS NERII BOYER DE FONSCOLOMBE (HOMOPTERA, APHIDIDAE) IN RELATION TO THE PRIMARY AND HYPER-PARASITOIDS ON DURANTA IN EGYPT.. EKB Journal Management System, 2007; 12(2): 709-730. doi: 10.21608/jpd.2007.45053

SEASONAL ABUNDANCE OF THE OLEANDER APHID APHIS NERII BOYER DE FONSCOLOMBE (HOMOPTERA, APHIDIDAE) IN RELATION TO THE PRIMARY AND HYPER-PARASITOIDS ON DURANTA IN EGYPT.

Journal of Productivity and Development
Article 25, Volume 12, Issue 2, July 2007, Page 709-730  XML PDF (287.32 K)
Document Type: Original Article
DOI: 10.21608/jpd.2007.45053
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Authors
Ahmed Saleh* ; Wafaa Gatwary
Plant Protection Research institute, Agric. Research Center, Dokki, Giza, Egypt.
Abstract
Seasonal abundance of the oleander aphid, Aphis nerii Boyer de
Fonscolombe and its associated parasitoids on duranta plants were studie in
Zagazig and Mansoura during the three seasons 2004/05, 2005/06 and
2006/07. Obtained data revealed that:
A. nerii infestation of duranta started by late September and early
October, respectively. It continued to late March in the three season. The
aphid numbers ranged between 10.88-48.04, 9.40-38.16 and 8.44-39.52
individuals/leaf, respectively in Zagazig during the three seasons. While, in
Mansoura the infestation started earlier in the first half of September. It
continued to early March. The aphid numbers ranged between 16.08-52.16,
15.72-37.56 and 14.00-41.00 individuals/leaf, respectively during the three
seasons.
In Zagazig, the aphid abundance showed three peaks in the three
seasons of study. The mean numbers of aphids/leaf was 25.64, 25.04 and
22.75, respectively during the three seasons, meanwhile in Mansoura the
aphid abundance showed three peaks in first season, four peaks in second
season and two peaks in third seasons. The mean numbers of aphids/leaf
were 26.63, 24.91 and 24.83, respectively during the three seasons.
Five hymenopterous parasitoids, Diaeretiella rapae (M`Intosh),
Aphidius sp. (Aphidiidae), (primary parasitoids) Pachyneuron sp.
(Pteromalidae), Alloxysta sp. (Cynipidae) and Aphidencyrtus sp.
(Encyrtidae) (Hyper parasitoids) were recorded..
D. rapae was the most dominant one, where it occupied 86.68 and
79.57 %, while, Aphidius sp. was 13.32 and 20.43 % in Zagazig and
Mansoura, respectively during the three seasons of study.
Pachyneuron sp. occupied 52.13, 61.62 %, while Aphidencyrtus sp.
was 26.95, 21.4% and Alloxysta sp. was 20.92 and 16.97 % in Zagazig and
Mansoura, respectively during the three season of study.
Total means of parasitism rates of primary parasitoids; D. rapae and
Aphidius spp. were 9.77, 8.69, 12.66 % and 3.39, 7.32, 7.34 % in Zagazig
and Mansoura during the three seasons, respectively.

Keywords
seasonal abundance; oleander aphid; Aphis nerii; boyer de fonscolombe; homoptera; aphididae; duranta; Egypt
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