New Insecticidal Amides from Petroleum Ether Extract of Dried Piper nigrum L. Whole Fruits

Isolation and identification of mosquito larvicidal compound from Abutilon indicum (Linn.) Sweet

“…Earlier report showed that the compounds like diterpenoid furans 6alpha-hydroxyvouacapan-7beta, 17beta-lactone (1), 6al-pha, 7beta-dihydroxyvouacapan-17beta-oic acid (2) and methyl 6alpha, 7beta-dihydroxyvouacapan-17beta-oate (3) from seeds of Pterodon spolygalaeflorus exhibited LC 50 values of 50.08, 14.69 and 21.76 microg/ml against fourthinstar A. aegypti larvae, respectively (Omena et al 2006). Siddiqui et al (2004) have reported that the compounds spipnoohine (1) and pipyahyine (2) isolated from the petroleum ether extract of dried ground whole fruits of V Variance of estimated log lethal dose; SE standard error; LC 50 lethal concentration that kills 50% of the exposed larvae; LC 90 lethal concentration that kills 90% of the exposed larvae; LL lower limit (95% confidence limit); UL upper limit (95% confidence limit); C x mean of Piper nigrum exhibited toxicity at 35.0 and 30.0 ppm, respectively, against fourth-instar larvae of A. aegypti. Park et al (2002) have also reported the compounds retrofractamide A (0.039 ppm), pipercide (0.1 ppm), guineensine (0.89 ppm), pellitorine (0.92 ppm) and Piperine (5.1 ppm) derived from the fruits of P. nigrum against A. aegypti thirdinstar larvae.…”

Larvicidal efficacy of five cucurbitaceous plant leaf extracts against mosquito species

“…Extracts or essential oils from plants may be alternative sources of mosquito larval control agents, as they constitute a rich source of bioactive compounds that are biodegradable into nontoxic products and potentially suitable for use in control of mosquito larvae. In fact, many researchers have reported on the effectiveness of plant extracts or essential oils against mosquito larvae (Sharma et al 2006;Rasheed et al 2005;Siddiqui et al 2004;Amer and Mehlhorn 2006 a, b).…”

Larvicidal activity of some Euphorbiaceae plant extracts against Aedes aegypti and Culex quinquefasciatus (Diptera: Culicidae)

“…The petroleum ether extracts of Rhinacanthus nasutus, Derris elliptica, Trigonostemon reidioides, Homalomena aromatica, Stemona tuberose, and Acorus calamus (Komalamisra et al 2005); Piper nigrum (Rasheed et al 2005;Siddiqui et al 2004); Chenopodium album and Sonchus oleraceus (Sharma et al 2006); Argemone mexicana (Sakthivadivel and Thilagavathy 2003); Solanum xanthocarpum (Mohan et al 2005); Ajuga remota (Sharma et al 2004); Thymus capitatus (Mansour et al 2000); Vitex negundo, Nerium oleander, and Syzygium jambolanum (Pushpalatha and Muthukrishnan 1995); Murraya koenigii, Coriandrum sativum, Ferula asafetida, and Trigonella foenum (Harve and Kamath 2004); and Eichhornia crassipes, Ageratum conyzoides, Cleome icosandra, Tagetes erectes, and Tridax procumbens (Saxena et al 1992) have been tested against the larvae of A. aegypti and C. quinquefasciatus.…”