Antifeedant activity of fruit and seed extracts ofMelia azedarach andazadirachta indica on larvae ofSesamia nonagrioides |
| |
Authors: | Andreu Juan Albert Sans Magí Riba |
| |
Affiliation: | (1) Area de Protecció de Conreus, Centre UdL-IRTA, 25198 Lleida, Spain |
| |
Abstract: | Methanolic extracts of seeds and fruits of the chinaberry tree,Melia azedarach L. (Meliaceae), showed strong antifeedant activity against 2nd instar larvae ofSesamia nonagrioides Lefèbvre (Lepidoptera: Noctuidae), a very serious pest of maize(Zea mays L.) in Mediterranean countries. Extracts were applied in an artificial diet at concentrations of 1000 and 2000 ppm. The parameters used to evaluate the activity were larval growth rates; quantity of food ingested; phagodepression/phagostimulation index; quantity of frass produced; quantity of material ingested; duration of larval development; and cumulative mortality. Seed extract showed high bioactivity at both doses, while fruit extract proved to be less active, and only at the higher dose used (2000 ppm) did it display a slight antifeedant activity. The activity of theM. azedarach seed extract at the higher dose (2000 ppm) was comparable to that of pure azadirachtin applied at a dose of 1.25 ppm, or to ‘Mubel’, a commercial extract ofAzadirachta indica A. Juss. (Meliaceae), applied at a dose of 75 ppm. |
| |
Keywords: | Melia azedarach Azadirachta indica Meliaceae Sesamia nonagrioides Lepidoptera Noctuidae antifeedant activity phagodepression azadirachtin commercial xtract of Meliaceae |
本文献已被 SpringerLink 等数据库收录! |
|