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Morsi G.A.,Plant Protection Res Institute
Egyptian Journal of Biological Pest Control | Year: 2010

Seasonal fluctuations of the population density of the sunt wax scale insect, Ceroplastes africanus Green (Homoptera: Coccidae) at Qena Governorate, Egypt and its parasitism were estimated on guava from May 2006 until April 2008. The parasitoid species, Anicetus africanus, Bothrriophrine tenuicornis, Microterys sp., Scutellista cyanea, Eublemma scitula and Marietta sp. were recovered from the scale insect. The sunt wax scale insect showed three annual peaks of abundance in the first year of study on June 20th; October, 20th and March 20th. In the second season of investigation, only two peaks were observed on July 20th and November 20th. Evaluations of mortality rates caused by the afore-mentioned parasitoids were estimated. Concerning the percentage of parasitism, the peaks were recorded on June 20th; August 5th; October 20 th, 2006 and March 20th, 2007 in the first season. Throughout the second year, the same trend was followed as four peaks of parasitism occurred on July 5th; September 5th; November 5th, 2007 and March 5th, 2008. Source


Morsi G.A.,Plant Protection Res Institute
Egyptian Journal of Biological Pest Control | Year: 2010

Seasonal fluctuations of the population density of the hemispherical soft scale insect, Saissetia coffeae (Walker) (S. hemispherica Targ.)(Homoptera: Coccidae) and its parasitoids were estimated on olive leaves from May 2007 until April 2009 at Beni-Suif Governorate, Egypt. Six parasitoid species were recovered, Coccophagus lycimnia Walker, Encyrtus inflex (Embleton), Metaphycus helvolus Comp., Microterys flavus (Howerd), Scutellista cyanea Motch.and Eublemma scitula Ramb. the hyperparasitoid, Marietta leopardina Motch. was also found associated with S. coffeae. S. coffeae had three and two periods of activity during the first and second seasons, respectively. The highest counts were 1333, 1384 and 1309 individuals/200 leaves by mid-July, mid-October and early March, respectively, in the first season. In the second season, early June and October, respectively recorded 2 peaks of 652 and 911 scales/200 leaves. Total rate of parasitism on S. coffeae in the first year showed three peaks of 52, 55 and 39% by mid-June, early August and early March, respectively. In the second year, three peaks represented 45, 46 and 41% parasitism occurred by early July, September and January, respectively. Source


Morsi G.A.,Plant Protection Res Institute
Egyptian Journal of Biological Pest Control | Year: 2010

Seasonal fluctuations of the population density of the African scale insect, Lecanodiaspis africana Newst (Homoptera: Lecanodiaspididae) at Qena Governorate, Egypt and its parasitoid were estimated on guava trees from May 2006 until April 2008. The parasitoid species, Anagyrus pseudococci, Microtyres flavus, Allotropa kamburovi, Scutellista cyanea and Eublemma scitula were found associated with L. africana. The predators, Pharoscymnus varius and Scymnus syriacus were found feeding upon this scale insect. The African scale insect had two annual peaks of abundance in the first year of study on July 20 th and November 20th. In the second year of investigation, three peaks were observed on June 5th; October 20th and March 20th. Rate of mortality caused by the parasitoids was estimated. Percentage of parasitism with the pteromalid, Scutillista cyaneae, peaked on June, 20th; August 5th; October 20th, 2006 and March 5th, 2007 and on July 5th; September 5th; November 5th and March 5th in the second year 2007/08. Source


Abdallah A.A.,Al - Azhar University of Egypt | El-Saiedy E.M.,National Research Center of Egypt | Maklad A.M.H.,Plant Protection Res Institute
Egyptian Journal of Biological Pest Control | Year: 2014

An evaluation of some control methods against the two-spotted spider mite, Tetranychus urticae Koch. on two faba bean Vicia faba L. cultivars (Sakha1 and Sakha3) was carried out under field conditions at Behaira Governorate, Egypt in season 2012. The predatory mite (Phytoseiulus persimilis Athias-Henriot), three fungi (Beauveria bassiana, Trichoderma harzianum and Cladosporium herbarium) and a chemical compound (Envidor 24% S.C.) were tested. Obtained results showed that the total average number of the mite population was significantly different on the both cultivars (F1,191 = 10.814; P < 0.01), with reduction percentage of significance of F1,150 = 9.46; P < 0.01. The mean reduction percentage of the mite population on both cultivars using the predatory mite, P. persimilis was significantly the highest (97.15%). Followed by the chemical control (Envidor) (84.30%) and then the three fungi (79.95% for B. bassiana, 75.46% for C. herbarium and 71.37% for T. harzianum). However, no significant difference between the chemical (Envidor) and the two fungi treatments, B. bassiana and C. herbarium was found. The results also implied that the faba bean cultivar (sakha3) was more susceptible for the infestation with T. urticae (141.63 individuals) compared with sakha171.04 individuals) under open field conditions. Therefore, it could be concluded that cultivating the variety sakha1 is preferable than sakha3 and using P. persimilis for controlling T. urticae was superior than using the other methods. © 2014, Egyptian Journal of Biological Pest Control. All rights reserved. Source


Morsi G.A.,Egyptian Plant Protection Res Institute | Moussa S.F.M.,Plant Protection Res Institute | Serag A.M.,Plant Protection Res Institute
Egyptian Journal of Biological Pest Control | Year: 2010

Seasonal fluctuation of the olive whitefly, Aleurolobus olivinus (Silvestri) (Homoptera: Aleyrodidae) was studied throughout the two successive years from March 2006 to February 2008. This study was conducted in an olive grove at Beni-Suif district, Beni-Suif Governorate, Egypt. Half-monthly samples of 100 olive leaves were collected at random. Peaks of the pest numbers were recorded by early April, June, November 2006 and January 2007. In the second year, the peaks were observed by early April, July, November 2007 and January 2008. Three species of Aphelinidae; Encarsia elegans Masi, E. olivina (Masi), and Ertmocerus sp. emerged from A. olivinus. Percentage ofparasitism on the olive whitefly peaked by early March, mid-May, mid-August, early October, mid-November and mid-December 2006. In the second year, peaks of the parasitism were recorded by early April, mid-July, early September, early October, early November and early December 2007. Correlation between the climatic factors and the population of A. olivinus and its parasitoids was statistically analyzed. Source

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