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VOL. 11, ISSUE 1 (2026)
Potential of Beauveria bassiana and Metarhizium anisopliae as Biological Control Agents against the Destructive Pests Callosobruchus maculatus and Myzus persicae
Authors
Rania H Mahmoud
Abstract
In the present investigation, the entomopathogenic fungi Beauveria
bassiana (Balsamo) and Metarhizium anisopliae (Metschnikoff) were
subjected to evaluation under controlled laboratory conditions in order to
determine their insecticidal efficacy. The pathogenicity of these fungi was
tested against the green aphid Myzus persicae (Hemiptera: Aphididae) and
the cowpea weevil Callosobruchus maculatus (Coleoptera: Chrysomelidae).
Both B. bassiana and M. anisopliae exhibited pathogenic activity
at all tested concentrations (1 × 10⁶, 1 × 10⁷, and 1 × 10⁸ spores/ml) against M.
persicae. The highest concentration (1 × 10⁸ spores/ml) of B. bassiana
produced the most pronounced effect, reducing populations by 82% in M.
persicae and 77.4% in C. maculatus within seven days. The two fungal
isolates were tested against adults of Callosobruchus maculatus (F.).
The insects were exposed to aqueous suspensions at varying concentrations, with
untreated cowpea weevils serving as the control group. Probit analysis revealed
that the LC₅₀ values were 1.29 × 10⁷ spores/ml for Beauveria bassiana
and 6.67 × 10⁷ spores/ml for Metarhizium anisopliae. In conclusion, the
application of B. bassiana and M. anisopliae as biopesticides
represents a sustainable and environmentally friendly strategy for the
management of insect pests in agriculture.
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Pages:284-288
How to cite this article:
Rania H Mahmoud "Potential of <i>Beauveria bassiana</i> and <i>Metarhizium anisopliae</i> as Biological Control Agents against the Destructive Pests <i>Callosobruchus maculatus</i> and <i>Myzus persicae</i>". International Journal of Entomology Research, Vol 11, Issue 1, 2026, Pages 284-288
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