, Volume 15, Issue 3, pp 169–180 | Cite as

Antifeedant and growth inhibitory effects of calamus oil and neem oil onSpodoptera litura under laboratory conditions

  • Opender Koul


A distillate of the essential oil of the rhizomes of Indian calamus (Acorus calamus L.) and seed oil of neem (Azadirachta indica A. Juss) were evaluated as emulsified foliage sprays againstSpodoptera litura (F.) larvae. A dose-response relationship of both oils was established using food acceptance, feeding ratio, weight gain and larval development as parameters in choice and no-choice tests. Calamus oil at the 0.5% and 1.0% concentrations was effective in both tests in inducing significant feeding deterrence and growth inhibition in early 3rd instar larvae. Neem oil had such an effect only at 2%, particularly in no-choice tests. The significance of these findings in the context of the possible action of calamus oil on gustatory receptors is discussed.

Key Words

Calamus oil neem oil Spodoptera litura antifeedant development inhibitor foliage spray 


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Copyright information

© Springer Science + Business Media B.V. 1987

Authors and Affiliations

  • Opender Koul
    • 1
  1. 1.Malti-Chem Research Centre, NandesariVadodaraIndia

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