Insecticidal activity of a novel fatty acid amide derivative from Streptomyces species against Helicoverpa armigera

Gopalakrishnan, S and Rajendran, V and Arumugam, S and Sharma, H C and Vadlamudi, S and Bhimineni, R K and Gonzalez, S V and Melø, T M and Simic, N (2016) Insecticidal activity of a novel fatty acid amide derivative from Streptomyces species against Helicoverpa armigera. Natural Product Research. pp. 1-10. ISSN 1478-6419

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Abstract

Helicoverpa armigera, an important pest causes serious damage to grain legumes. The main objective of this study was to isolate and identify the metabolite against H. armigera from a previously characterised Streptomyces sp. CAI-155. The culture filtrate of CAI- 155 was extracted using Diaion HP-20 and the active fractions were fractionated on Silica and C18 column chromatography. The C18 active fraction was further fractionated on Silica gel 60 F254 thin layer chromatography (TLC). The most active fraction (Rf 0.64) purified from TLC led to the identification of a novel metabolite N-(1-(2,2-dimethyl- 5-undecyl-1,3-dioxolan-4-yl)-2-hydroxyethyl)stearamide by spectral studies. The purified metabolite showed 70–78% mortality in 2nd instar H. armigera by diet impregnation assay, detached leaf assay and greenhouse assay. The LD50 and LD90 values of the purified metabolite were 627 and 2276 ppm, respectively. Hence, this novel metabolite can be exploited for pest management in future.

Item Type: Article
Divisions: RP-Grain Legumes
CRP: CGIAR Research Program on Grain Legumes
Uncontrolled Keywords: Helicoverpa armigera; Streptomyces; Biological control; Pest management
Subjects: Others > Plant Pathology
Others > Entomology
Depositing User: Mr B K Murthy
Date Deposited: 18 Mar 2016 08:48
Last Modified: 19 Apr 2016 02:58
URI: http://oar.icrisat.org/id/eprint/9391
Official URL: http://dx.doi.org/10.1080/14786419.2016.1154055
Projects: UNSPECIFIED
Funders: Department of Biotechnology, Government of India
Acknowledgement: The authors are grateful to the Department of Biotechnology, Government of India for funding this study. This work was undertaken as part of the CGIAR Research Program on Grain Legumes. ICRISAT is a member of CGIAR Consortium.
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