Activity of spore-crystal mixtures of new Bacillus thuringiensis strains against Dendrolimus pini (Lepidoptera: Lasiocampidae) and Spodoptera exigua (Lepidoptera: Noctuidae)

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dc.contributor.authorKonecka, Edyta
dc.contributor.authorKaznowski, Adam
dc.contributor.authorStachowiak, Małgorzata
dc.contributor.authorMaciąg, Mirosław
dc.contributor.organizationAdam Mickiewicz University in Poznań, Faculty of Biology, Department of Microbiologyen
dc.contributor.organizationGeneral Directorate of the State Forest, Forest Protecting Unit Łopuchówkoen
dc.date.accessioned2019-01-03T14:16:08Z
dc.date.available2019-01-03T14:16:08Z
dc.date.issued2018-03-15
dc.description.abstractWe estimated the usefulness of spore-crystals preparations of the two B. thuringiensis isolates, M PU B 9 and MPU B54, for reducing the number of pests. The potential insecticidal toxicities of B. thuringiensis isolates were assessed by the analysis of the genes coding for crystalline proteins. The activities of spore-crystals preparations were determined against Dendrolimus pini L. (Lepidoptera: Lasiocampidae) and compared with the toxicity of spores and crystals of B. thuringiensis subsp. kurstaki HD-1 from commercial biopesticide Foray. Although the analysis of crystalline toxin gene profiles indicated potentially higher activities of MPU B9 and MPU B54 crystals against the pests than that of HD-1, the toxicities of isolate and HD-1 preparations against D. pini caterpillars were similar. The LC50 amounted to 3.42×104 spores and crystals for HD-1, 3.36×104 for MPU B9 and 3.5×104 for MPU B54. Additionally, the toxicity of the MPU B54 preparation was evaluated against Spodoptera exigua (Hubner) (Lepidoptera: Noctuidae). The LC50 was 4.5×105 spores and crystals of MPU B54, and 2.69×106 spores and crystals of HD-1. The LC50 of the MPU B54 preparation against S. exigua was approximately six-fold higher than that of HD-1. However, due to the very wide fiducidal limits for LC50 values, which for both preparations overlap to a large extent, the toxicity of the preparations should be considered the same. The varied profiles of crystalline toxin genes and important toxicity of spore-crystal mixtures of isolates against S. exigua and D. pini indicate the effectiveness of the mixtures against pests and make the strains an alternative for HD-1 for reducing the number of insects.en
dc.identifier.citationKonecka, E., Kaznowski, A., Stachowiak, M., & Maciąg, M. (2018). Activity of spore-crystal mixtures of new Bacillus thuringiensis strains against Dendrolimus pini (Lepidoptera: Lasiocampidae) and Spodoptera exigua (Lepidoptera: Noctuidae), Folia Forestalia Polonica, 60(2), 91-98.en
dc.identifier.doi10.2478/ffp-2018-0009
dc.identifier.urihttps://open.icm.edu.pl/handle/123456789/16268
dc.language.isoen
dc.publisherThe Committee on Forestry Sciences and Wood Technology of the Polish Academy of Sciences and the Forest Research Institute in Sekocin Staryen
dc.rightsUznanie autorstwa-Użycie niekomercyjne-Bez utworów zależnych 3.0 Polska*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/pl/*
dc.subjectBacillus thuringiensisen
dc.subjectbacterial toxinsen
dc.subjectinsecticidal toxicityen
dc.subjectLepidopteraen
dc.subjectplant protectionen
dc.titleActivity of spore-crystal mixtures of new Bacillus thuringiensis strains against Dendrolimus pini (Lepidoptera: Lasiocampidae) and Spodoptera exigua (Lepidoptera: Noctuidae)en
dc.typearticleen
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