Pathogenicity of Entomopathogenic Metarhizium anisopliae Against Rhyzopertha dominica (Bostrichidae: Coleoptera)
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Keywords:
Rhyzopertha Dominica, Entomopathogenic Fungi, Biological Control, Mortality, Metarhizium AnisopliaeAbstract
Rhyzopertha dominica is regarded as the most devastating insect pest among stored wheat
grains. Indiscriminate use of pesticides and fumigants to control lesser grain borer has resulted in
insecticide resistance, environmental hazards, residual toxicity and pest resurgence so biological control
measures have attained high significance i.e. entomopathogenic fungi like Beauveria bassiana and
Metarhizium anisopliae were used as biological-control against this pest. Research work on
pathogenicity of entomopathogenic fungus, M. anisopliae was executed against lesser grain borer at its
different concentrations at PMAS Arid Agriculture University Rawalpindi. Results revealed that the
higher concentrations were more effective than the lower concentrations of entomopathogenic fungus.
Against lesser grain borer the fungal efficacy was directly proportional to the time exposure. Conducted
research depicted that for M. anisopliae, concentration of 1×108 spores/ml caused the maximum 93.33%
mortality after 72 hours’ interval. The consequences of the research provided an effective and safe
biological control measures and in future will lead to an operative IPM management for this monetary
pest.
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