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. 2011:11:157.
doi: 10.1673/031.011.15701.

Chemical composition and larvicidal activities of the Himalayan cedar, Cedrus deodara essential oil and its fractions against the diamondback moth, Plutella xylostella

Abha Chaudhary  1 , Prabha Sharma, Gireesh Nadda, Dhananjay Kumar Tewary, Bikram Singh
Affiliations

Chemical composition and larvicidal activities of the Himalayan cedar, Cedrus deodara essential oil and its fractions against the diamondback moth, Plutella xylostella

Abha Chaudhary et al. J Insect Sci. 2011.

Abstract

Plants and plant-derived materials play an extremely important role in pest management programs. Essential oil from wood chips of Himalayan Cedar, Cedrus deodara (Roxburgh) Don (Pinales: Pinaceae), was obtained by hydrodistillation and fractionated to pentane and acetonitrile from which himachalenes and atlantones enriched fractions were isolated. A total of forty compounds were identified from these fractions using GC and GC-MS analyses. Essential oils and fractions were evaluated for insecticidal activities against second instars of the diamondback moth, Plutella xylostella L. (Lepidoptera: Yponomeutidae), using a leaf dip method. All samples showed promising larvicidal activity against larvae of P. xylostella. The pentane fraction was the most toxic with a LC₅₀ value of 287 µg/ml. The himachalenes enriched fraction was more toxic (LC₅₀ = 362 µg/ml) than the atlantones enriched fraction (LC₅₀ = 365 µg/ml). LC₅₀ of crude oil was 425 µg/ml and acetonitrile fraction was LC₅₀ = 815 µg/ml. The major constituents, himachalenes and atlantones, likely accounted for the insecticidal action. Present bioassay results revealed the potential for essential oil and different constituents of C. deodara as botanical larvicides for their use in pest management.

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Figures

Figure 1.
Figure 1.
Fractionation protocol for essential oil of Cedrus deodara. High quality figures are available online.
Figure 2.
Figure 2.
Preliminary screening of Cedrus deodara wood chip oil and its different fractions against larvae of P. xylostella (48 hours). High quality figures are available online.
Figure 3.
Figure 3.
Structures of major constituents of Cedrus deodara. High quality figures are available online.
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