Insecticidal activity against Aedes aegypti larvae of some medicinal South American plants

Larvicidal activity of oil-resin fractions from the Brazilian medicinal plant Copaifera reticulata Ducke (Leguminosae-Caesalpinoideae) against Aedes aegypti (Diptera, Culicidae)

“…It was refractioned to give, among other subfractions, CRM [1][2][3][4] with an LC 50 of 0.2ppm and an NMR spectrum that confirmed the presence of sesquiterpenoids (Table 2). CRM 5 was rather less active than the oil-resin and, on further fractionation, gave the subfraction CRM [5][6][7] with an LC 50 of 0.8ppm, such that the TLC and NMR ( 1 H and 13 C) data showed the presence of clerodane and labdane diterpenoids ( Table 2). 95% CI -confidence interval at 95% probability LC 50 -Lethal concentration required to kill 50% of the population exposed LC 90 -Lethal concentration required to kill 90% of the population exposed ppm -parts per million…”

Homeopathic and larvicide effect of Eucalyptus cinerea essential oil against Aedes aegypti

“…Resistance of the dipteran insect to conventional insecticides (Furtado et al, 2005) has been reported in different countries (Wirth and Georghiou, 1999), including Brazil (Macoris et al, 2003). Studies with natural products such as insecticides and larvicides have been undertaken for the control of mosquito Aedes, albeit with different results (Rahuman et al 2000, Markouk et al 2000, Ciccia et al, 2000, Tsao et al, 2002, Silva et al, 2004Furtado et al, 2005). There are no reports in the literature on studies investigating the effects of homeopathic medicine on A. aegypti, although there are reports on control of pest insects such as Spodoptera frugiperda (Almeida et al, 2003) and Cerotoma tingomarianus (Fazolin et al, 2000).…”

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

“…In recent times, studies on the activity of plant extracts towards Aedes sp. 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).…”