Aphid Species (Homoptera : Aphididae) Infesting Navel Orange Tress and Their Aphidophagous Insect at El-Khattara District, Sharkia Governorate, Egypt | ||||
| Journal of Plant Protection and Pathology | ||||
| Article 2, Volume 12, Issue 11, November 2021, Page 765-774 PDF (992.14 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jppp.2021.206303 | ||||
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| Authors | ||||
shehta ali lashen  1; Walaa M. M. Helaly2; Sherin M. M. Y. Helaly2
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| 1Plant Protection Research Institute , Dokki, Egypt | ||||
| 2Plant Prot. Dept., Fac. of Agric. , Zagazig Univ., Zagazig, Egypt | ||||
| Abstract | ||||
| Studies on aphids infesting navel orange trees and their aphidophagous insect were conducted in newly reclaimed sandy area at El-Khattara district, Sharkia Governorate, Egypt during 2020 and 2021 seasons. The obtained results are summarized as follows: Four aphid species were recorded infested navel orange trees. 23 predaceous insect species belonging to four orders and eight families were recorded. Coleopterous species were the most dominant, followed by the dipterous and neuropterous with general relative densities of 45.04, 26.44 and 24.46 % of the total recorded predators, successively. Four species of lacewing belonging to two families were recoded i.e. C. carnea , Chrysemosa jeanneli (Navás) (Chrysopidae), Wesmaelius navasi (Andréu) and Sympherobius fallax (Navás) (Hemerobiidae).The second and third species were first record in Egypt and afrotropical region according to the distribution map number (136 and 106) , provided by the British Museum , respectively. Among all recorded predaceous species, Chrysoperla carnea (Stephens), Coccinella undecimpunctat L., Sphaerophoria flavicauda Zett. and Coccinella septempunctata L., were the predominant species, comprised 18.55, 17.90, 11.21 and 9.23 % of the total recorded predators, successively. Eight parasitoids species were recorded viz., Diaeretiella rapae (M'Intosh), Aphidius colemani Viereck, Aphidius matricariae Haliday , Aphidius sp < em>., Lysiphlebus fabarum (Mars.), Trioxys sp < em>. , Ephedrus sp.and Praon sp.(Aphidiidae). The most dominant parasitoids were D. rapae , A. colemani, A. matricariae and Aphidius sp., with general relative densities of 59.69 ,17.52 , 8.12 and 7.48 % , respectively. There were positive highly significant correlations between weekly numbers of the aphids and emerged parasitoids in both seasons. | ||||
| Keywords | ||||
| Aphids; Predators; Parasitoids; Aphidophagous Insects; navel orange; Seasonal abundance; New species | ||||
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