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Peer review of the pesticide risk assessment of the active substance Bacillus thuringiensis subsp. kurstaki strain PB 54.

ABSTRACT: The conclusions of the EFSA following the peer review of the initial risk assessments carried out by the competent authorities of the rapporteur Member State, Denmark, and co-rapporteur Member State, the Netherlands, for the pesticide active substance Bacillus thuringiensis subsp. kurstaki strain PB 54 and the considerations as regards the inclusion of the substance in Annex IV of Regulation (EC) No 396/2005 are reported. The context of the peer review was that required by Commission Implementing Regulation (EU) No 844/2012, as amended by Commission Implementing Regulation (EU) No 2018/1659. The conclusions were reached on the basis of the evaluation of the representative uses of Bacillus thuringiensis subsp. kurstaki strain PB 54 as an insecticide on stone fruit and ornamentals (field uses) and tomato (field, permanent greenhouse and walk-in tunnel uses). The reliable end points, appropriate for use in regulatory risk assessment, are presented. Missing information identified as being required by the regulatory framework is listed. Concerns are identified.

SUBMITTER: European Food Safety Authority (EFSA)

PROVIDER: S-EPMC8028025 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Peer review of the pesticide risk assessment of the active substance Bacillus thuringiensis subsp. kurstaki strain EG2348.

Project description:The conclusions of the European Food Safety Authority (EFSA) following the peer review of the initial risk assessments carried out by the competent authorities of the rapporteur Member State, Denmark, and co-rapporteur Member State, the Netherlands, for the pesticide active substance Bacillus thuringiensis subsp. kurstaki strain EG2348 and the considerations as regards the inclusion of the substance in Annex IV of Regulation (EC) No 396/2005 are reported. The context of the peer review was that required by Commission Implementing Regulation (EU) No 844/2012, as amended by Commission Implementing Regulation (EU) No 2018/1659. The conclusions were reached on the basis of the evaluation of the representative uses of Bacillus thuringiensis kurstaki strain EG2348 as an insecticide on pome fruits (field use), solanaceous fruiting vegetables (uses in permanent greenhouse and walk-in tunnel) and ornamentals (field, permanent greenhouse and walk-in tunnel uses). The reliable end points, appropriate for use in regulatory risk assessment, are presented. Missing information identified as being required by the regulatory framework is listed. Concerns are identified.

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Peer review of the pesticide risk assessment of the active substance Bacillus thuringiensis subsp. kurstaki strain SA-12.

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Peer review of the pesticide risk assessment of the active substance Bacillus thuringiensis subsp. kurstaki strain SA-11.

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Peer review of the pesticide risk assessment of the active substance Bacillus thuringiensis subsp. kurstaki strain ABTS-351.

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Complete genome sequence of Bacillus thuringiensis subsp. kurstaki strain HD73.

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Persistence of Bacillus thuringiensis subsp. kurstaki in Urban Environments following Spraying.

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Peer review of the pesticide risk assessment of the active substance Bacillus thuringiensis ssp. aizawai strain ABTS-1857.

Project description:The conclusions of EFSA following the peer review of the initial risk assessments carried out by the competent authorities of the rapporteur Member State The Netherlands and co-rapporteur Member State Germany for the pesticide active substance Bacillus thuringiensis ssp. aizawai strain ABTS-1857 and the considerations as regards the inclusion of the substance in Annex IV of Regulation (EC) No 396/2005 are reported. The context of the peer review was that required by Commission Implementing Regulation (EU) No 844/2012, as amended by Commission Implementing Regulation (EU) No 2018/1659. The conclusions were reached on the basis of the evaluation of the representative uses of Bacillus thuringiensis ssp. aizawai strain ABTS-1857 as an insecticide on fruiting vegetables (pepper, field and greenhouse uses). The reliable end points, appropriate for use in regulatory risk assessment, are presented. Missing information identified as being required by the regulatory framework is listed. Concerns are identified.

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Peer review of the pesticide risk assessment of the active substance Bacillus thuringiensis ssp. aizawai strain GC-91.

Project description:The conclusions of EFSA following the peer review of the initial risk assessments carried out by the competent authorities of the rapporteur Member State The Netherlands and co-rapporteur Member State Germany for the pesticide active substance Bacillus thuringiensis ssp. aizawai strain GC-91 and the considerations as regards the inclusion of the substance in Annex IV of Regulation (EC) No 396/2005 are reported. The context of the peer review was that required by Commission Implementing Regulation (EU) No 844/2012, as amended by Commission Implementing Regulation (EU) No 2018/1659. The conclusions were reached on the basis of the evaluation of the representative uses of Bacillus thuringiensis ssp. aizawai strain GC-91 as an insecticide on pome fruits (apple, pear), grapes and sports turf (field uses) and tomato (greenhouse uses). The reliable end points, appropriate for use in regulatory risk assessment, are presented. Missing information identified as being required by the regulatory framework is listed. Concerns are identified.

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Insecticidal toxins from Bacillus thuringiensis subsp. kenyae: gene cloning and characterization and comparison with B. thuringiensis subsp. kurstaki CryIA(c) toxins.

Project description:Genes encoding insecticidal crystal proteins were cloned from three strains of Bacillus thuringiensis subsp. kenyae and two strains of B. thuringiensis subsp. kurstaki. Characterization of the B. thuringiensis subsp. kenyae toxin genes showed that they are most closely related to cryIA(c) from B. thuringiensis subsp. kurstaki. The cloned genes were introduced into Bacillus host strains, and the spectra of insecticidal activities of each Cry protein were determined for six pest lepidopteran insects. CryIA(c) proteins from B. thuringiensis subsp. kenyae are as active as CryIA(c) proteins from B. thuringiensis subsp. kurstaki against Trichoplusia ni, Lymantria dispar, Heliothis zea, and H. virescens but are significantly less active against Plutella xylostella and, in some cases, Ostrinia nubilalis. The sequence of a cryIA(c) gene from B. thuringiensis subsp. kenyae was determined (GenBank M35524) and compared with that of cryIA(c) from B. thuringiensis subsp. kurstaki. The two genes are more than 99% identical and show seven amino acid differences among the predicted sequences of 1,177 amino acids.

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Distribution of cryV-type insecticidal protein genes in Bacillus thuringiensis and cloning of cryV-type genes from Bacillus thuringiensis subsp. kurstaki and Bacillus thuringiensis subsp. entomocidus.

Project description:DNA dot blot hybridizations with a cryV-specific probe and a cryI-specific probe were performed to screen 24 Bacillus thuringiensis strains for their cryV-type (lepidopteran- and coleopteran-specific) and cryI-type (lepidopteran-specific) insecticidal crystal protein gene contents, respectively. The cryV-specific probe hybridized to 12 of the B. thuringiensis strains examined. Most of the cryV-positive strains also hybridized to the cryI-specific probe, indicating that the cryV genes are closely related to cryI genes. Two cryV-type genes, cryV1 and cryV465, were cloned from B. thuringiensis subsp. kurstaki HD-1 and B. thuringiensis subsp. entomocidus BP465, respectively, and their nucleotide sequences were determined. The CryV1 protein was toxic to Plutella xylostella and Bombyx mori, whereas the CryV465 protein was toxic only to Plutella xylostella.

| S-EPMC167511 | biostudies-other

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