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VOL. 6, ISSUE 6 (2021)
The endophytic fungus, Alternaria tenuissima isolated from the leaves of common castor bean Ricinus communis L. as biocontrol tool against Locusta migratoria L
Authors
Laib Djamel Eddine, Benzara Abdelmadjid, Boulaouad belkacem Aimene, Akkal Salah
Abstract
The present study aimed to investigate the insecticidal activity of the endophytic fungus, A. tenuissima, isolated from the leaves of common castor bean R. communis. To evaluate the insecticidal activity, ten concentrations (0. 2 to 2 g/L) of the fungal extract were applied by contact and ingestion against L. migratoria. The results showed that the fungal extract had variable insecticidal activities that depended on the concentration used and time after treatment. The most effective concentration against the insects was 2 g/L, with a maximum mortality rates of 73, 91 % and 100 % for L. migratoria upon contact and ingestion treatments, respectively. The LC50 values indicated that the fungal extract was toxic against the insects with LC50 values ranging from 0, 56 to 1, 39 for L. migratoria contact treatment and from 0, 803 to1, 321 for L. migratoria ingestion treatment. Chemical analysis of the fungal extract revealed the presence of polyphenols, alkaloids, terpenoids, saponins, and tannins as the metabolites responsible for these activities. Attenuated total reflection-Fourier transform infrared analysis of the fungal extract revealed the presence of the presence of sulfone, nitro, imine, enol ether, alkyne, and hydroxyl groups. Specifically, GC-MS-MS analysis revealed the presence of many insecticidal volatiles for both fungal extract and colony.
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Pages:275-281
How to cite this article:
Laib Djamel Eddine, Benzara Abdelmadjid, Boulaouad belkacem Aimene, Akkal Salah "The endophytic fungus, <em>Alternaria tenuissima </em>isolated from the leaves of common castor bean <em>Ricinus communis</em> L. as biocontrol tool against <em>Locusta migratoria</em> L ". International Journal of Entomology Research, Vol 6, Issue 6, 2021, Pages 275-281
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