Fumigant toxicity effects of hexane extract of three species of eucalyptus (Eucalyptus microtheca, E. globules & E. camaldulensis) on Oryzaephilus surinamensis (Coleoptera: Silvanidae)

Subject Areas : Plant Protection

Mona Fallahi ¹ , Ahmad Heidari ² , Saeid Moharamipour ³ , Sohrab Imani ⁴ , Aref Maroof ⁵

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Received: 2012-01-07 Accepted : 2013-08-17 Published : 2013-08-23

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Abstract :

Due to chemical and synthetic pesticides hazards on the environment and the human health, trend to using botanical and natural pesticides increased. Eucalyptus plant as a potential plant for pest control can be studied for this purpose. This experiment was conducted to investigate the insecticidal effects of hexane extract of three species eucalyptus (Eucalyptus globules, E. microtheca & E. camaldulensis) on different developmental stages of Saw-toothed grain beetle (Oryzaphilus surinamensis) In this experiment larvae and adult were exposed to eucalyptus hexane extract for 24 hours under laboratory conditions 28±10C, 65±5% RH. LC50 values of three Eucalyptus hexane extract (E. microtheca, E. globules, E. camaldulensis) were estimated 1507, 1552, 1608 µl/l air and 2078,2172,2229 µl/l air for adult and larval stage respectively. According to values calculated, the adults insect were more susceptible than larval stage to eucalyptus hexane extract.

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