The Influence of Pesticides on the Spore Viability, Toxin Stability and Larvicidal Activity of Bacillus sphaericus 2362 Strain

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dc.contributor.authorBerber, İsmet
dc.contributor.authorAtalan, Ekrem
dc.contributor.authorÇökmüş, Cumhur
dc.date.accessioned2014-09-03T13:15:46Z
dc.date.available2014-09-03T13:15:46Z
dc.date.issued2004
dc.description.abstractIn this study, 12 different commercial pesticides, in-cluding 5 fungicides, 5 herbicides, 1 aphicide and 1 acari-cide, were investigated for their effects on spore viability, toxin stability and larvicidal activity of a mosquito patho-genic B. sphaericus 2362 strain. Minimal inhibitory con-centrations (MICs) of each pesticide were determined after 48 h incubation of B. sphaericus 2362 strain. Ac-cording to MIC results, all pesticides showed various inhibitory effects on the growth of the test bacterium. Particularly, the pesticides which contain TCA, hymexa-zol, copper sulphate, hexythiazox, 2,4-D Amine, copper inhibited spore germination significantly and bacterial growth even at the lowest tested concentrations. Our re-sults indicated that various commercial pesticides in dif-ferent concentrations reduced the spore viability signifi-cantly and heat-resistant spore numbers of B. sphaericus 2362 strain. In general, the pesticides decreased the spore numbers 104-105-fold compared to initial ones. Further-more, it was observed that the larvicidal activity was completely lost when it was grown at the concentration of MIC values or higher. Indeed, SDS-PAGE analysis con-firmed that the binary toxin proteins, 41.9 kDa and 51.4 kDa, were lost at the MIC values and higher concentra-tions although parasporal crystals did not disappear in the much lower pesticide concentration.
dc.identifier.citationBerber, İ., Atalan, E., Çökmüş, C. "The Influence of Pesticides on the Spore Viability, Toxin Stability and Larvicidal Activity of Bacillus sphaericus 2362 Strain", Fresenius Environmental Bulletin, Vol.13, No: 5, pp.424-429.
dc.identifier.urihttp://www.psp-parlar.de/pdf/F_23_195_pp424_429.pdf
dc.identifier.urihttps://hdl.handle.net/11486/525
dc.language.isoen
dc.publisherFresenius Environmental Bulletin
dc.relation.publicationcategoryMakale - Kategorisiz
dc.subjectPesticides
dc.subjectB. sphaericus 2362
dc.subjectToxin stability
dc.subjectLarvicidal activity and SDS-PAGE
dc.titleThe Influence of Pesticides on the Spore Viability, Toxin Stability and Larvicidal Activity of Bacillus sphaericus 2362 Strain
dc.typeArticle

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