Fatty Acid Composition of Eight Isolates of Entomopathogenic Nematodes from Five Egyptian Governorates | ||||
Egyptian Academic Journal of Biological Sciences, G. Microbiology | ||||
Article 1, Volume 9, Issue 3, December 2017, Page 1-8 PDF (389.8 K) | ||||
DOI: 10.21608/eajbsg.2017.16322 | ||||
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Authors | ||||
Meligy A. A.; Azazy A. M.; Sorour H. A.; Monzer M. A . | ||||
Pest Physiology Dept., Plant Protection Research Institute (PPRI), Agricultural Research Center | ||||
Abstract | ||||
The fatty acid composition of infective juveniles (IJs) related to five isolates of Heterorhabditis indica (EGAZ1, EGAZ2, EGAZ3, EGAZ4, and EGAZ5) and three isolates of Steinernema carpocapsae (EGAZ9, EGAZ10 and SA) collected from five Egyptian Governorates was assessed. Also, fatty acid composition of IJs from two commercially relevance strains of H. bacteriophora (HP88)and S. carpocapsae (All), was examined for comparison. Newly emerged IJs of all isolates had fatty acid number and pattern similar to that of the corresponding commercial species. Of the ten fatty acids identified, oleic, was the main fatty acid in all species and isolates. Unsaturated fatty acids were dominant and total amount of saturated fatty acids of H. indica isolates was significantly higher than that of S. carpocapsae isolates. Palmitic was the second most abundant fatty acid in IJs of H. indica isolates, while linoleic was the second most abundant fatty acid in IJs of S. carpocapsae isolates. Of the tested Egyptian isolates, IJs of EGAZ3 and EGAZ5 of H. indica had the highest amounts of fatty acids and their contents of saturated fatty acids/gram body weight are comparable to that of the commercial strain. It is suggested that isolates EGAZ3 and EGAZ5 of H. indica are the candidates for developing practical Egyptian bio-control product based on nematode formulation. | ||||
Keywords | ||||
Entomopathogenic nematode; Heterorhabditis indica; Heterorhabditis bacteriophora; Steinernema carpocapsae; fatty acid | ||||
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