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Evaluation of Essential Oil and its Three Main Active Ingredients of Chinese Chenopodium Ambrosioides (Family: Chenopodiaceae) against Blattella Germanica

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Author(s): Wei Xiang Zhu | Kun Zhao | Sha Sha Chu | Zhi Long Liu

Journal: Iranian Journal of Arthropod-Borne Diseases
ISSN 1735-7179

Volume: 6;
Issue: 2;
Start page: 90;
Date: 2012;
Original page

Keywords: Blattella Germanica | Chenopodium Ambrosioides | Essential Oil | Fumigant | Contact Toxicity

ABSTRACT
Background: The efficacy of essential oil of Chenopodium ambrosioides flowering aerial parts and its three main active ingredients was evaluated against Blattella germanica male adults.Methods: Composition of essential oil was determined by GC-MS. Topical application bioassay was used to evalu­ate contact toxicity of essential oil and three main components. Fumigant toxicity of essential oil and its main com­ponents was measured using a sealed space method.Results: Twenty-two components were identified in the essential oil and the main components were (Z)-ascaridole (29.7%), isoascaridole (13.0%), ρ-cymene (12.7%) and piperitone (5.0%). The essential oil and (Z)-ascaridole, isoascaridole and r-cymene possessed fumigant toxicity against male German cockroaches with LC50 values of 4.13, 0.55, 2.07 and 6.92 mg/L air, respectively. Topical application bioassay showed that all the three compounds were toxic to male German cockroaches and (Z)-ascaridole was the strongest with a LD50 value of 22.02 mg/adult while the crude oil with a LD50 value of 67.46 mg/adult.Conclusion: The essential oil from Chinese C. ambrosioides and its three main active ingredients may be explored as natural potential insecticides in the control of cockroaches.
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