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Alexandria University (2007)

Ecological Studies On The Important Insect Pests On Apple Trees At El-Beheira Governorate

Darwish, Adnan Abdel-Fattah El-Sayed

Titre : Ecological Studies On The Important Insect Pests On Apple Trees At El-Beheira Governorate

Auteur : Darwish, Adnan Abdel-Fattah El-Sayed.

Etablissement de soutenance : Alexandria University

Grade : Master of Science (MSc) in Economic Entomology 2007

Apple, Malus domesticus, is one of the important fruit in Egypt. Available statistics refer that apple orchards in Nobaria district occupy 70 % from the total area of apple orchard in Egypt. These orchards are infested by the many of insect pests. Some of these pests may cause serious economic damage to apple trees. 1-Survey of the insect pests on apple trees at El-Beheira Governorate : The aim of this study was to make a survey of insect pests infesting apple trees at two districts in El-Beheira Governorate during the two successive seasons 2004/05 and 2005/06 : A) Nobaria district (Newly reclaimed desert land) : Twenty six insect species belonging to seventeen families and five orders were recorded as follow ; Seven species appeared to be important pests (Major Insect Pests), Fig scale insect, (Russelaspis pustulans) ; Apple wooly aphids, (Eriosoma lanigerum) ; Leopard moth, (Zeuzera pyrina) ; Pubescent rose chafer, (Tropinota squalida) ; Shot hole bark beetle, (Scolytus amygdali) ; Peach fruit fly, (Bactrocera zonata) ; Mediterranean fruit fly, (Ceratitis capitata). Secondary Pests, Oyster shell scale, (Lepidosaphes ulmi) ; San Jose scale, (Quadraspidiotus perniciousus) ; Cotton aphids, (Aphis gosspyii) ; Apple clear wing moth, (Synathedon myopaeformis) ; California red scale, (Aonidiela aurantii). Occasional Pests, Retithrips syiacus, Parltoria olea, Hemiberlesia latania, Ceroplastes floridensis, Dysaphes plantaginea, Iceria purchasi, Iceria seychellarum, Pseudococcus citri, Leyonetia clerkella, Anarsia lineatella, Pachnoda fasciata, Pentodon disbar, Carpophilus hemipterus, Drosophila melanogaster. B) Abou El-Matamir district (Old delta land) : Sixteen insects belonging to 13 families and four order were recorded ; Hemiptera (eight species, Aonidiela aurantii, Quadraspidiotus perniciousus, Iceria aegyptiaca, Eriosoma lanigerum, Emposca faba, Nezara viridula, Iceria seychellarm, Aphis gossypii), Lepidoptera (Synathedon myopaeformis, Zeuzera pyrina) Coleoptera (Carpophilus hemipterus, Tropinota squalida , Scolytus amygdali) Diptera (Bactrocera zonata, Ceratitis capitata , Drosophila melanogaster). 2- Population studies on main economic insect pests on apple trees : 2.1. Fig Scale Insect Russelaspis postulans, Seasonal abundance of R. pustulans total population : Four peaks of the total population recorded in the two seasons ; November 11th, May 5th, July 14th and August 25th throughout the first season from October 21st 2004 till October 20th 2005. In the consecutive season (2005/06) the four peaks were recorded in November 17th, April 6th, July 13th and October 19th. Population dynamic of immature : The first nymphal instar (Crawlers), three peaks of infestation with the first nymphal instar of R. pustulans were recorded in November 18th, June 30th and October 6th in the 1st season, in the 2nd season, three peaks with this instar were recorded in November 17th, June 29th and October 19th. The second nymphal instar, there are two peaks of infestation for the 2nd nymphal stage at the two seasons, recorded in the first season in January 13th and July 17th respectively, in the 2nd season in December 15th and July 13th respectively.

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Page publiée le 15 mars 2019