Applied Entomology and Zoology (2001) 36, 117-120

G. Sheeba, S. Seshadri, N. Raja, S. Janarthanan and S. Ignacimuthu (2001)
Efficacy of Beauveria bassiana for control of the rice weevil Sitophilus oryzae (L.) (Coleoptera : Curculionidae)
Applied Entomology and Zoology 36 (1), 117-120
Abstract: An entornopathogenic fungus, Beauveria bassiana was tested against the rice weevil Sitophilus oryzae. Bioassays were conducted by introducing 25 adult insects on 50 g of B.. bassiana mixed rice in glass jars maintained at 28±2°C, and 70% RH. Mortality was monitored at five-day intervals until 25 days. At higher doses (7.6 log conidia/ml), B. bassiana produced a higher percentage of mortality up to 75.8% and F₁ adult emergence was reduced by 86.2%. At lower concentrations B. bassiana was not effective against S. oryzae. The study stresses the need for higher numbers of conidial inoculation for maximum mortality.
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Research topic(s) for pests/diseases/weeds:
biocontrol - natural enemies
Research topic(s) for beneficials or antagonists:
evaluation - screening - selection

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Sitophilus oryzae	Stored grain	India
Beauveria bassiana (entomopathogen)	Sitophilus oryzae	Stored grain	India