Repellent activity of essential oils against cockroaches (Dictyoptera: Blattidae, Blattellidae, and Blaberidae) in Thailand. Southeast Asian J Trop Med Public Health

National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand.
The Southeast Asian journal of tropical medicine and public health (Impact Factor: 0.72). 08/2007; 38(4):663-73.
Source: PubMed


Seven commercial essential oils extracted from the plant species Boesenbergia rotunda (L.) Mansf., Citrus hystrix DC., Curcuma longa L., Litsea cubeba (Lour.) Pers., Piper nigrum L., Psidium guajava L. and Zingiber officinale Roscoe, and naphthalene as a control, were evaluated for repellent activity against the three cockroach species Periplaneta americana (L.), Blattella germanica (L.) and Neostylopyga rhombifolia (Stoll) under laboratory conditions. The essential oil derived from Citrus hystrix showed the best repellency over other candidate essential oils and naphthalene. The essential oil of Citrus hystrix exhibited complete repellency (100%) against P. americana and B. germanica, and also showed the highest repellency (among the essential oils tested) of about 87.5% against N. rhombifolia under laboratory conditions. In the field, Citrus hystrix essential oil formulated as a 20% active ingredient in ethanol and some additives provided satisfactory repellency of up to 86% reduction in cockroaches, mostly P. americana and N. rhombifolia with a residual effect lasting a week after treatment. Citrus hystrix essential oil has good potential for being used as a cockroach repellent. Further improvements in efficacy and residual activity may be realized with appropriate formulations.

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    • "In another study, the essential oil of Citrus hystrix exhibited 100 % repellency effect against P. americana and Blatella germanica , and also about 87.5% against Neostylopyga rhombifolia under laboratory conditions . The essential oil caused an 86% reduction in cockroaches with a residual effect lasting a week after treatment in the field (Thavara et al. 2007). These results are also similar to repellency values of oregano oil that continued for at least a week or even 10 days after treatment. "

    Full-text · Article · Jan 2016
    • "There are a lot of studies about repellent and fumigant activity of essential oils and their components against cockroaches. For example, Thavara et al. [16] used seven essentials oils extracted from Boesenbergia rotunda (L.) Mansf., Citrus hystrix DC., "
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    ABSTRACT: The aim of this research was to evaluate the fumigant activity of essential oils obtained from aerial parts of three Lamiaceae plants [Mentha longifolia L. subsp. typhoides (Brig.) Harley, Dorystoechas hastata Boiss. & Heldr. ex Bentham (endemic), and Origanum minutiflorum O. Schwarz et. H. Davis (endemic)] which naturally grow in Antalya region on 10-15 days old (2nd or 3rd instar) nymphs of German cockroach (Blattella germanica L.) at different concentrations ranging from 25 to 500 µl/L. GC- MS analysis revealed the presence of 1,8-cineole (25.9%), borneol (18.98%) and camphor (16.93%) in D. hastata, car-vacrol (97.93%) in O. minutiflorum, as well as cis-piperitone epoxide (53.25%) and piperitenone oxide (31.46%) in M. longifolia subsp. typhoides. When all essential oils were compared on the basis of fumigant toxicity, D. hastata essential oil is a more statistically significant fumigant than the other two essential oils at 100, 200 and 300 µl/L levels. There is no significant difference found at these concentrations between M. longifolia and O. minutiflorum essential oils. Moreover, at application levels of 400 and 500 µl/L, the most toxic essential oil was also from D. hastata, followed by those of M. longifolia and O. minutiflorum, respectively.
    No preview · Article · Jun 2012 · Fresenius Environmental Bulletin
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    • "development of resistance in cockroaches, as well as the hazardous effects on human health and the negative effects on the environment has limited the use of these chemicals. Therefore, intensive efforts are being put to find alternative environmentally friendly compounds such as plant-based repellents (Ngoh et al., 1998; Thavara et al., 2007; Yoon et al., 2009). Up to now, no study has been reported on the evaluation of plant-based repellents against cockroaches in Turkey. "
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    ABSTRACT: The aim of this research was to determine the repellent and antimicrobial activities of the essential oil and hexanic extracts obtained from the leaves and fruits of Schinus molle L. (Anacardiaceae). The composition of essential oils and hexanic extracts were analyzed by GC-MS. Oriental cockroach (Blatta orientalis L.) adults and nine bacterial strains were used for repellent and antimicrobial activity assays, respectively. The best antimicrobial activities were determined at 30 µg/ml dosage for Escherichia coli 0157:H7 and Bacillus cereus with leaf extracts. At all doses (176, 70 and 35 µg/cm2) the leaf essential oil showed not significant repellency than the positive control, DEET (N,N diethyl-m-toluamide), Hexanic extract of the leaf showed good repellency (83.33%) at the highest concentration (0.075 mg/L) against the oriental cockroach. The results indicated that the essential oil and hexanic extracts of S. molle showed potential in terms of antimicrobial and repellent activities.
    Full-text · Article · Nov 2010 · Journal of medicinal plant research
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