Efficacy of plant extracts and oils as mosquito repellents

Eucalyptus essential oil as a natural pesticide

“…Based on the study, these workers concluded that these essential oils could be used for the development of new products for control of human head lice (Ceferino et al, 2006). Eucalyptus oil has also been used as an antifeedant, particularly against biting insects (Trigg, 1996a,b;Trigg and Hill, 1996;Chou et al, 1997;Thorsell et al, 1998). Trigg (1996a,b) reported that eucalyptus based products used on humans as insect repellent can protect from biting insects up to 8 h depending upon the concentration of the essential oil.…”

Screening of plants found in the State of Amazonas, Brazil for activity against Aedes aegypti larvae

“…larvae from different parts of the world, such as, North America (Bergeron et al, 1996), Argentina, Bolivia, Brasil and Peru (Chantraine et al, 1998;Ciccia et al, 2000;Macedo et al, 1997), Trinidade and Tobago (Chariandy et al, 1999), Mali (Diallo et al, 2001), Negev Desert (Sathiyamoorthy et al, 1997) and Africa (Marston et al, 1993), among others, have been published and have revealed numerous examples of active plant extracts representing diverse taxonomic groups. More systematic and directed studies have revealed a number of very active plant extracts, essential oils, and isolated larvicidal phytochemicals (Bandara et al, 2000;Bernard et al, 1995;Hostettmann & Potterat, 1997;Latha & Ammini, 2000;Lee, 2000;Oberlies et al, 1998;Park et al, 2002;Pushpalatha & Muthukrishnan, 1999;Rahuman et al, 2000;Sharma et al, 1998;Thorsell et al, 1998). In the present study, we have screened polar extracts of mostly native plants from the Brazilian Amazon for activity against larvae of the hemorrhagic dengue fever vector, Aedes aegypti (Diptera: Culicidae), at a single test concentration of 500 µg / mL.…”

Comparison of the tick repellent efficacy of chemical and biological products originating from Europe and the USA

“…Among the isolated substances, the following were found often at high concentrations: citronellol, geraniol, cineoles, monoterpenoids, cyclopantenes, azadirachtin etc. (Büchel 1970;Cockcroft et al 1998;Mumcuoglu et al 1996;Thorsell 1998;Marazanye et al 1988;Watanabe et al 1995;Sharma et al 1993Sharma et al , 2001Schreck et al 1995). However, in many cases, it turned out that the essential oils alone-especially in high concentrations-may introduce phototoxic and allergenic reactions or even lead to olfactory and skin reactions (see Barnard 1999;Faulde 2001;Semmler et al 2009).…”