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Susceptibility of Plutella xylostella (L.) to Bacillus thuringiensis Berliner strains 小菜蛾对苏云金芽孢杆菌柏林菌株的敏感性研究
BioAssay Pub Date : 2021-12-28 DOI: 10.37486/1809-8460.ba11001
C. Viana, S. A. De Bortoli, E. C. Pedroso, A. M. Vacari
{"title":"Susceptibility of Plutella xylostella (L.) to Bacillus thuringiensis Berliner strains","authors":"C. Viana, S. A. De Bortoli, E. C. Pedroso, A. M. Vacari","doi":"10.37486/1809-8460.ba11001","DOIUrl":"https://doi.org/10.37486/1809-8460.ba11001","url":null,"abstract":"The objective was to observe the susceptibility of a population of Plutella xylostella (L.) maintained for 100 generations in laboratory to strains of Bacillus thuringiensis Berliner. The concentrations 9×104, 1.5×105, 6×105, 8×105, 9×105, 1.5×106, 2×106, 3×106, 4.5×106, 6×106, 7.5×106, 9×106, 1.5×107, 2×107, 3×107, 4×107, 4.5×107, 6×107, 7.5×107, 9.5×107, 1.5×108 e 3×108 spores/mL were evaluated for the strains: E1, 49.30A, E2, 1.7L, T3A.259, T3A.140, T08024, E26, E22 and T07. The strains E26, E22 and T07 did not cause mortality for P. xylostella larvae. The P. xylostella larvae have a very high susceptibility pattern to the concentrations evaluated for six strains tested (E1, 49.30A, E2, 1.7L, T3A.259 and T3A.140). Only the T08.024 strain allowed the estimation of lethal concentration that kills 50% of the population (2.7 spores/mL).","PeriodicalId":395961,"journal":{"name":"BioAssay","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132577361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effective Use of Emamectin Benzoate for the Management of Spodoptera frugiperda (J. E. Smith) in Maize 苯甲酸埃维菌素在玉米夜蛾防治中的有效应用
BioAssay Pub Date : 2021-12-28 DOI: 10.37486/1809-8460.ba12001
Fátima T. Rampelotti-Ferreira, L. V. Thiesen, J. N. Corassa, A. Nardon, Leandro V. dos Santos, D. Rosa, R. M. Pitta
{"title":"Effective Use of Emamectin Benzoate for the Management of Spodoptera frugiperda (J. E. Smith) in Maize","authors":"Fátima T. Rampelotti-Ferreira, L. V. Thiesen, J. N. Corassa, A. Nardon, Leandro V. dos Santos, D. Rosa, R. M. Pitta","doi":"10.37486/1809-8460.ba12001","DOIUrl":"https://doi.org/10.37486/1809-8460.ba12001","url":null,"abstract":"Emamectin benzoate has been largely used for controling lepidopterans larvae in grains and fiber crops and, therefore, selection of resistant populations to this pesticide is a real risk if ignored the insect resistance management (IRM) strategies. We studied the susceptibility of Spodoptera frugiperda (Smith, 1797) populations in the state of Mato Grosso - Brazil to Emamectin benzoate as well as a field study about Mode of Action rotation including this compound. Low variations in susceptibility (resistance ratios, 1,01-7,31 fold) were detected among the evalueted S. frugiperda populations. The field study reinforced our monitorings outcome that Emamectin Benzoate controls S. frugiperda and its use in IRM in Mato Grosso is practicable. Susceptibility monitoring should be continuous in order to detect possible increases of tolerance rates not only for this pesticide but also for all compounds used for this pest management aiming to apply early mitigation actions.","PeriodicalId":395961,"journal":{"name":"BioAssay","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116245418","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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