The Toxicity of Selected Monoterpene Hydrocarbons as Single Compounds and Mixtures against Different Developmental Stages of Colorado Potato Beetle, Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae)

Research Article

The Toxicity of Selected Monoterpene Hydrocarbons as Single Compounds and Mixtures against Different Developmental Stages of Colorado Potato Beetle, Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae)

M. Safaei Khorram, N. Taher Nasabi, S. Jafarnia and S. Khosroshahi

In the present study, 6 pure monoterpene hydrocarbons were tested as single compounds and mixtures for their toxicity against the second and third instars larvae and adults of Colorado potato beetle (Leptinotarsa decemlineata Say). In order to measure the toxicity of compounds tested insects were placed in glass Petri dishes, in which monoterpene hydrocarbons had been sprayed. Tested compounds used in 2 different doses, 5 and 10 mg/Petri dish. The majority of tested compounds were found to be toxic to the larvae and adults; however, the percentage of mortality varied from 15 to 100%. In general, Limonene and Myrcene showed strong toxicity against the second instars larvae and adults. α-Pinene had relatively high toxicity against the adults. However, γ-Terpinene was more toxic against the second instars larvae. The toxicity of Camphene was low against all developmental stages. In mixtures, γ-Terpinene displayed antagonistic effects but other compounds showed effects varying from no observable to additive. According to the outcome of this study these 6 compounds can be used as potential control agents against both larvae and adults of Colorado potato beetle either as single compounds or in mixtures.

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M. Safaei Khorram, N. Taher Nasabi, S. Jafarnia and S. Khosroshahi, 2011. The Toxicity of Selected Monoterpene Hydrocarbons as Single Compounds and Mixtures against Different Developmental Stages of Colorado Potato Beetle, Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae). Journal of Entomology, 8: 404-416.

DOI: 10.3923/je.2011.404.416

URL: https://scialert.net/abstract/?doi=je.2011.404.416

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Authors

M. Safaei Khorram

N. Taher Nasabi

S. Jafarnia

S. Khosroshahi

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Research Article

The Toxicity of Selected Monoterpene Hydrocarbons as Single Compounds and Mixtures against Different Developmental Stages of Colorado Potato Beetle, Leptinotarsa decemlineata Say (Coleoptera: Chrysomelidae)

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