1. Helmi, A. and A.A. Sahar, 2017. Repellency effect of some biochemical extracts of castor bean leaf on two sap-sucking insect pests. Egypt. Acad. J. Biolog. Sci., 10: 37-47.
2. Ashraf, H., A. Sharaf and I. Heba, 2017. Fingerprinting of leafhoppers on medicinal and aromatic plants in egypt using ISSRs. Munis Entomol. Zool., 112: 224-233.
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3. Mansour, E.S.K., A.K. Sobeiha, K.W. Mahmoud and A. Helmi, 2016. Identification and quantification of allelochemicals contain in certain tomato cultivars by GC-MS technique. J. Boil. Chem. Environ Sci., 12: 1-10.
4. Helmi, A., 2016. Threshold of development and thermal constant for different stages of the seychelles fluted scale, Icerya seychellarum (Westwood). Mun. Ent. Zoo., 11: 638-642.
5. Helmi, A. and H.I. Mohamed, 2016. Biochemical and ultrastructural changes of some tomato cultivars after infestation with aphis gossypii glover (Hemiptera: Aphididae) at qalyubiyah, Egypt. Gesunde Pflanzen, 68: 41-50.
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6. Helmi, A. and A. Sharaf, 2016. Genetic differentiating Aphis fabae and Aphis craccivora (Hemiptera: Sternorranycha: Aphididae) populations in Egypt using mitochondrial COI. Biologia, 71: 1266-1273.
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7. Darbain, S., A.K. Emam, A. Helmi, S.S. El- Badawy and S. Moussa, 2016. Susceptibility of certain tomato cultivars to infestation with Tuta absoluta (Meyrick) (Lepidoptera:Gelechiidae)in relation to leaflet trichomes. Egypt. J. Agric. Res., 94: 829-840.
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8. Ibrahim, H.E., A.K. Emam, A. Helmy and M.A. Ahmed, 2015. Survey of leafhoppers on medicinal and aromatic plants in Egypt (Hemiptera: Auchenorrhyncha: Cicadellidae). J. Plant Prot. Pathol. 6: 1163-1173.
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9. Helmi, A., A. Neama, A. Abd-Elhamed, G.H. Mohamed, A.A.E. Abbas and A.A. Tharwat, 2015. Population fluctuations of Icerya seychellarum (Westwood) on mulberry trees in Egypt. Egypt J. Appl. Sci., 30: 169-184.
10. Helmi, A. and R. Rashwan, 2015. Susceptibility of some solanaceous plant cultivars to sap-sucking insects infestation and their associated natural enemies. J. Plant Prot., Mansoura Univ., 6: 763-781.
11. Helmi, A. and R. Rashwan, 2013. Effect of wheat cultivars and sown dates on aphid infestation in Egypt. Mun. Entomol. Zool., 8: 825-830.
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12. Amin, A.H., A. Helmi, E.A. El-Wan and A.S. Youssef, 2013. Bionomic and life table parameters of olive psyllid, Euphyllura straminea on olive seedlings under three constant temperatures. Mun. Entomol. Zool., 8: 294-304.
13. Amin, A.H., A. Helmi and A.S. Youssef, 2013. Inducing resistance in olive seedlings against olive psyllid, Euphyllura straminea, using natural phenol compound. Greener J. Agric. Sci., 3: 295-298.
14. Youssef, A.S., A.H. Amin, E.A. Elwan and A. Helmi, 2011. Field evaluation of some insecticides against the olive psyllid, Euphyllura straminea loginova (Homoptera: Psylloidea, Aphalaridae) on olive trees in Ismailia Governorate, egypt. Egypt. J. Agric. Res., 89: 73-80.
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15. Helmi, A., 2011. Host-associated population variations of Bemisia tabaci (Genn.) (Hemiptera: Sternorrhyncha: Aleyrodidae) characterized with random DNA markers. Int. J. Zool. Res., 7: 77-84.
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16. Helmi, A. and A.F. Khafaga, 2011. Molecular fingerprinting of certain cereal aphids in Egypt (Hemiptera: Sternorrhyncha: Aphididae) using RAPD and ISSRs markers. J. Entomol., 8: 327-340.
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17. Esmail-Samar, S., A. Hemi, S. El-Refai and F.A. Aly, 2011. Population dynamics and control of Bemisia tabaci (Genn.) on some vegetable plants under protected cultivation at Giza Governorate. J. Egypt Ger. Soc. Zool., 62: 13-24.
18. Helmi, A., 2010. Isozymes electrophoretic variations among hosts and localities populations of Bemisia tabaci (Genn.) (Hemiptera: Aleyrodidae) in Egypt. Mun. Ent. Zool., 58: 707-715.
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19. Helmi, A., 2010. Host plants-associated population variations of Bemisia tabaci (Genn.) (Hemiptera: Sternorrhyncha: Aleyrodidae) characterized with random DNA markers. Mun. Ent. Zool., 5: 677-685.
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20. Helmi, A. and M.M. El-Fatih, 2010. Identification of apterous viviparous of cereal aphids in Egypt (Hemiptera: Sternorrhyncha: Aphididae). Munis Entomol. Zool., 6: 346-357.
21. Fathi, A.H. and M.M. El-Fatih, 2009. Identification of apterous viviparous of cereal aphids in Egypt (Hemiptera: Sternorrhyncha: Aphidoidea). Bull. Ent. Soc. Egypt, 86: 307-325.
22. Amin, A.H., A. Helmi and K.A. Emam, 2009. Genetic fingerprinting of fifteen whitefly species in Egypt. (Hemiptera: Aleyrodidae). J. Biol. Chem. Environ. Sci., 4: 473-490.
23. Amaar-Mona, I., A. Helmi, A.K. Emam, M.F.A.H. Hegab and Mahassen M. A. Sidky, 2009. Influence of three Sap-sucking insect pests infestations on essential oil of sweet marjoram (Origanum Majorana L.). Egypt J. Agric. Res., 87: 1245-1252.
24. Amin, A.H., A. Helmi and S.A. El-Serwy, 2008. Ecological studies on sugar beet insects at Kafr El-Sheikh Governorate, Egypt. J. Agric. Res., 86: 2129-2319.
25. Helmi, A., 2005. Some ecological aspects of two whitefly species infesting Arab Jasmine shrubs in Egypt. (Hemiptera: Sternorrhyncha: Aleyrodidae). Arab Univ. J. Agric. Sci., Ain Shams Univ., Cairo, 13: 951-962.
26. Helmi, A., A.H. Amin, M.E. Foda and K.A. Emam, 2002. Ecological studies on the citrus whitefly Dialeurodes citri (ashmead) [Hemiptera: Aleyrodidae]. Bull. Res. Fac. Agric. Ain Shams Univ., 20: 55-68.
27. Amin, A.H., A.K. Emam and A. Helmi, 1997. A new record of a whitefly species of the genus Aleurotuberculatus (Homoptera: Aleyrodidae) on citrus trees in Egypt. Med. Fac. Landbouww. Univ. Gent, 62: 349-354.
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