Effects of neem limonoids on the malaria vector Anopheles stephensi Liston (Diptera: Culicidae).
The effects of the neem (Azadirachta indica A. Juss) limonoids azadirachtin, salannin, deacetylgedunin, gedunin, 17-hydroxyazadiradione and deacetylnimbin on Anopheles stephensi Liston (Diptera: Culicidae) were investigated. In exploring advantages of pure neem limonoids, we studied the larvicidal, pupicidal, adulticidal and antiovipositional activity of neem limonoids. Azadirachtin, salannin and deacetylgedunin showed high bioactivity at all doses, while the rest of the neem limonoids were less active, and were only biologically active at high doses. Azadirachtin was the most potent in all experiments and produced almost 100% larval mortality at 1 ppm concentration. In general, first to third larval instars were more susceptible to the neem limonoids. Neem products may have benefits in mosquito control programs.
Nathan
Sengottayan Senthil
SS
Department of Environmental Engineering, Chonbuk National University, Jeonju City, South Korea. senthilkalaidr@hotmail.com
Kalaivani
Kandaswamy
K
Murugan
Kadarkarai
K
D000818:Animals; D000852:Anopheles / Q000187:drug effects*; D005260:Female; D007306:Insecticides / Q000494:pharmacology*; D007814:Larva / Q000187:drug effects* / Q000254:growth & development; D036701:Limonins / Q000494:pharmacology*; D008297:Male; D010936:Plant Extracts / Q000494:pharmacology; D011679:Pupa / Q000187:drug effects / Q000254:growth & development; D013329:Structure-Activity Relationship
D007306:Insecticides; D036701:Limonins; D010936:Plant Extracts; C010329:azadirachtin