Browsing by Author Ashraf Helmi


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Issue DateTitleAuthor(s)
1997Amin, A. H.; A. K. Emam and A. Helmi (1997). A species of the genus Aleurotuberculatus on citrus trees in Egypt.A Helmi ; Amin A. H.; A. K. Emam; Aleyrodidar
2019Aphids on Medicinal and Aromatic Plants in Egypt (Hemiptera: Aphididae). J.A. Helmi ; Mahmoud E. R.; Dahroug S M A; M. Hewidy
2019Aphids on Medicinal and Aromatic Plants in Egypt (Hemiptera: Aphididae).Ashraf Helmi ; Mahmoud E. R.; Dahroug S M A; M. Hewidy
1-Mar-2016Biochemical and Ultrastructural Changes of Some Tomato Cultivars after Infestation with Aphis gossypii Glover (Hemiptera: Aphididae) at Qalyubiyah, EgyptAshraf Helmi ; Mohamed, Heba Ibrahim
2022Biological aspects, lower developmental threshold and thermal requirements of Cotton seed bug, Oxycarenus hyalinipennis (Costa)El-Taher A. Sh.; M. S. Abdel-Wahed; Ashraf Helmi ; H. F. Dahi
2013Bionomic and life table parameters of olive psyllid, Euphyllura straminea on olive seedlings under three constant temperatures.Ashraf Helmi ; Amin, A. H.; E. A. El-Wan; A. S. Youssef
2002Ecological studies on the citrus whitefly Dialeurodes citri (Ashmead) [Hemiptera: Aleyrodidae].Ashraf Helmi ; A. H. Amin; M. E. Foda; Azza, K. Emam
2008Ecological Studies on Sugar beet Insects at Kafr El- Sheikh Governorate, Egypt.A Helmi ; Amin, A. H.; S. A. El-Serwy
2013Effect of wheat cultivars and sown dates on aphids infestation un Egypt.A. Helmi ; R. Rashwan
Jun-2013EFFECT OF WHEAT CULTIVARS AND SOWN DATES ON APHID INFESTATION IN EGYPTAshraf Helmi ; Rashwan, Rania 
2011Field Evaluation Of Some Insecticides Against Olive Psyllid, Euphyllura Straminea On Olive Trees In Ismailia Governorate (Homoptera: Psylloidea, Aphalaridae). Egypt.A. Helmi ; Youssef, A. S.; Amin A.H. ; E. A. Elwan
2016Fingerprinting of Leafhoppers on Medicinal and Aromatic Plants in Egypt Using ISSRs.Ashraf Helmi ; A. Sharaf; E. Heba
1-Nov-2016Genetic differentiating Aphis fabae and Aphis craccivora (Hemiptera: Sternorranycha: Aphididae) populations in Egypt using mitochondrial COIAshraf Helmi ; Sharaf, Abdoallah 
2009Genetic fingerprint of fifteen whitefly species in Egypt. (Hemiptera: Aleyrodidae).Ashraf Helmi ; Amin, A. H.; Azza K. Emam 
2011Host plants-Associated population variations of Bemisia tabaci (Genn.) (Hemiptera: Sternorrhyncha: Aleyrodidae) characterized with Random DNA Markers.A Helmi 
1-Jan-2011Host-associated population variations of bemisia tabaci (genn.) (hemiptera: Sternorrhyncha: Aleyrodidae) characterized with random dna markersAshraf Helmi 
2017Identification And Quantification Of Allelochemicals Contain In Certain Tomato Cultivars By GC- MS TechniqueA.K. sobeiha ; Ashraf Helmi ; A. Helmi; K. W. Mahmoud
2009Identification of apterous viviparous of cereal aphids in Egypt (Hemiptera: Sternorrhyncha: Aphididae).A Helmi ; M. M. El Fatih
1-Sep-2020Identification of some Egyptian leafhopper species (Hemiptera: Cicadellidae) using DNA barcodingIbrahim, Heba E.; Ashraf Helmi ; Sharaf, Abdoallah ; Emam, Azza 
2013Inducing Resistance in Olive Seedlings against Olive Psyllid, Euphyllura straminea Using Natural Phenol Compound.A. Helmi ; Amin A. H.; A. S. Youssef
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