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Utilization of Ruta graveolens and Azadirachta indica leaf powders and their binary combinations for the management of Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) in stored maize in Sri Lanka

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dc.contributor.author Perera, A.G.W.U.
dc.contributor.author Karunaratne, M.M.S.C.
dc.contributor.author Chinthaka, S.D.M.
dc.date.accessioned 2017-10-27T06:27:11Z
dc.date.available 2017-10-27T06:27:11Z
dc.date.issued 2016
dc.identifier.citation Perera, A.G.W.U., Karunaratne, M.M.S.C., Chinthaka, S.D.M. (2016). "Utilization of Ruta graveolens and Azadirachta indica leaf powders and their binary combinations for the management of Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) in stored maize in Sri Lanka", pp. 01-17 en_US, si_LK
dc.identifier.uri http://dr.lib.sjp.ac.lk/handle/123456789/6230
dc.description.abstract Attached en_US, si_LK
dc.description.abstract M aize w eevil (Sito p h ilu s zeam ais, M otsch.) is a ubiquitous and cosm opolitan field-to-store pest o f m aize o f econom ic im portance in tropical and subtropical regions o f the w orld. T he current renew ed interest to replace synthetic insecticides has served as the im petus for the evaluation and intensification o f eco-friendly anti-w eevil m easures such as the use o f plant based bioinsecticides. T his study w as therefore, designed to investigate the insecticidal and repellent potency o f leaf pow ders o f R uta graveolens and A zadirachta indica in single treatm ents and com binations o f various proportions under am bient laboratory conditions against Sitophilus zeam ais in both contact and vap o u r form s. For both plants, 100 g each o f m aize grains w ere m ixed w ith leaf pow ders at different doses o f 1.0, 3.0, 5.0, 7.0 and 10.0 g. T he bio-potential o f three com binations o f 1:1, 1:2 and 2:1 o f R. graveolens and A. indica le a f pow ders incorporating into the dosage level o f lO.Og w as also evaluated. M aize grains treated w ith R. graveolens leaf pow der caused 100 % contact and 68 % fum igation m ortalities w ithin 24 hours o f exposure w hilst repelling 97 % and 96 % w eevils w ithin an hour in both contact and vapour form s respectively. A. indica pow der w as less efficacious com pared to that o f R. graveolens causing significantly low er repellency w ithin an hour and m ortalities after 10 days o f storage. A pplication o f 2:1 com bination o f R. graveolens and A. indica produced respective levels o f 100 % and 73% contact and fum igation m ortalities w ithin 24 hours and highly significant repellent effects on S. zeam ais, offering greater potential for large-scale storage since such com binations are relatively cheaper than using either o f the botanicals singly. L ea f pow ders o f the tw o plants under present investigation revealed their im proved grain protecting capacity w hen used individually and in m ixtures as bio-rational leads in large-scale protection o f stored m aize.
dc.language.iso en_US en_US, si_LK
dc.subject Sitophilus zeamais en_US, si_LK
dc.subject Ruta graveolens en_US, si_LK
dc.subject Azadirachta indica en_US, si_LK
dc.subject repellency en_US, si_LK
dc.subject leaf powder en_US, si_LK
dc.subject combinations en_US, si_LK
dc.title Utilization of Ruta graveolens and Azadirachta indica leaf powders and their binary combinations for the management of Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae) in stored maize in Sri Lanka en_US, si_LK
dc.type Article en_US, si_LK


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