Entomotoxic effect of silica nanoparticles against Sitophilus oryzae (L.)

Fumigants and residual insecticides are commonly used to combat stored grain pests. In recent years, consumer awareness of the health hazard from residual toxicity and the growing problem of insect resistance to these conventional insecticides have led the researchers to look for alternative strateg...

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Bibliographic Details
Published in:Journal of pest science 2011-03, Vol.84 (1), p.99-105
Main Authors: Debnath, Nitai, Das, Sumistha, Seth, Dipankar, Chandra, Ramesh, Bhattacharya, Somesh Ch, Goswami, Arunava
Format: Article
Language:English
Subjects:
Agriculture
Amorphous nanosilica
Biomedical and Life Sciences
Consumers
Diatomaceous earth
Ecology
Entomology
Forestry
Fumigants
Grain
Grain storage
Health hazards
Hydrophobicity
Insect control
Insecticide resistance
Insecticides
Insects
Kinetics
Life Sciences
Lipophilic
Mortality
Nanocides
Nanoparticles
Original Paper
Oryza sativa
Pest control
Pest resistance
Pesticides
Pests
Plant Pathology
Plant Sciences
Silica
Silicon dioxide
Single-nucleotide polymorphism
Sitophilus oryzae
Toxic hazards
Toxicity
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Summary:Fumigants and residual insecticides are commonly used to combat stored grain pests. In recent years, consumer awareness of the health hazard from residual toxicity and the growing problem of insect resistance to these conventional insecticides have led the researchers to look for alternative strategies for stored grains protection. For example, diatomaceous earth (DE) can be effective against stored grain insects. In this study, DE was used to design amorphous nano sized hydrophilic, hydrophobic, and lipophilic silica in 15-30 nm size range. Nanocides are expected to reduce the volume of application and kinetics of development of resistance in pests. We hypothesized that surface-functionalized silica nanoparticle (SNP) might be a viable alternative to conventional pesticides. Entomotoxicity of SNP was tested against rice weevil Sitophilus oryzae and its efficacy was compared with bulk-sized silica (individual particles larger than 1 μm). Amorphous SNP was found to be highly effective against this insect pest causing more than 90% mortality, indicating the effectiveness of SNP to control insect pests.
ISSN:1612-4758
1612-4766
DOI:10.1007/s10340-010-0332-3