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- W1966996978 abstract "Aqueous extract of Melia azedarach seeds were tested against cabbage aphid, Brevicoryne brassicae, and its predator Coccinella septempunctata in a cabbage field. The field experiment was conducted at Bridge to Israel children village farm, around the vicinity of Tewodros campus, University of Gondar, where the cabbage was grown fully organically. A field experiment was started in the middle of April 2011 and completed at the end of May 2011. The experiment was conducted in a randomised block design (RBD). For the field trial, a total of 12 plots were prepared with 1 m2 area for data collection. The powdered M. azedarach seeds were used to prepare 5% concentration of aqueous solution and sprayed. Before spraying, percentage of aphid infestation was recorded from the control plot and the experimental plot. The average percentage of cabbage infestation in the control plot was 72% and in the experimental plot before treatment was 80.85%. The percentage reduction of aphid population was 19.06% after the first spraying. However, maximum percentage reduction of 86.5% was recorded after the completion of six-week treatment. The overall percentage reduction increased proportionately from the first to sixth week. The number of predator population was reduced and the reduction was not statistically significant (p > 0.05). The present study proved that Melia seed extracts were effective against cabbage aphids under field condition. Further, it is evident that the beneficial interaction between botanical extracts and biological control organism in the field showed safety to natural enemies. In conclusion, Melia seed extract can be useful for small-scale farmers to protect their cabbage crop against cabbage aphid, B. brassicae." @default.
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- W1966996978 date "2012-07-01" @default.
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- W1966996978 title "Field evaluation of aqueous extract of<i>Melia azedarach</i>Linn. seeds against cabbage aphid,<i>Brevicoryne brassicae</i>Linn. (Homoptera: Aphididae), and its predator<i>Coccinella septempunctata</i>Linn. (Coleoptera: Coccinellidae)" @default.
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- W1966996978 doi "https://doi.org/10.1080/03235408.2012.673260" @default.
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