Data/hora: 16/06/2024 10:10:58

Biblioteca(s): | Embrapa Meio Ambiente.
Data corrente: | 20/01/2022
Data da última atualização: | 14/07/2023
Autoria: | PORSANI, M. V.; POITEVIN, C. G.; TRALAMAZZA, S. M.; SOUZA, M. T. de; SOUZA, M. T. de; SILVA, E. D. B. da; ZAWADNEAK, M. A. C.; PIMENTEL, I. C.; MELO, I. S. de.
Afiliação: | MARIANA VIEIRA PORSANI, UFPR; CAROLINA GRACIA POITEVIN, UFPR; SABINA MOSER TRALAMAZZA, ICB-USP; MIRELI TROMBIN DE SOUZA, UFPR; MICHELE TROMBIN DE SOUZA, UFPR; ÉDER DAVID BORGES DA SILVA, UFPR; MARIA APARECIDA CASSILHA ZAWADNEAK, UFPR; IDA CHAPAVAL PIMENTEL, UFPR; ITAMAR SOARES DE MELO, CNPMA.
Título: | Streptomyces spp. isolated from marine and caatinga biomes in Brazil for the biological control of Duponchelia fovealis.
Ano de publicação: | 2022
Fonte/Imprenta: | Neotropical Entomology, v. 51, n. 2, p. 299-310, 2022.
ISSN: | 1678-8052
DOI: | https://doi.org/10.1007/s13744-022-00942-1
Idioma: | Inglês
Conteúdo: | Abstract: Actinobacteria have been drawing attention due to their potential for the development of new pest control products. We hereby assess the effects of Streptomyces isolated from marine and caatinga biomes against Duponchelia fovealis Zeller (Lepidoptera: Crambidae), a pest associated with the strawberry culture at a global scale. To this end, eggs deposited by adults were immersed for 5Â s in a bacterial suspension, and the larvae were fed on leaflets placed in glass tubes containing bacterial suspensions. In both treatments, the control was a saline solution. The bioassays demonstrated that the Streptomyces strains were able to cause the death of D. fovealis eggs (â?? 40%) and larvae (â?? 65%) compared to untreated eggs (1.4%) and larvae (2.0%). The crude extract of strain T49 and the chitinase extract of strain T26 affected larval growth when applied directly to the thorax of first-instar larvae (larval-adult lifespan of 65.3â??Â±â??0.5Â days and 67.5â??Â±â??0.7Â days, respectively; survival of 61.2â??Â±â??1.2%) in relation to the control treatment (larval-adult lifespan of 41.75â??Â±â??0.2Â days and survival of 83.7â??Â±â??2.6%). The Streptomyces spp. strains T41, T49, and T50 caused antifeeding activity. Apart from larval mortality, the adults that emerged from the larvae exposed to the extracts presented morphological abnormalities, and the mothsâ?? chitin spectra showed clear alterations to the pupa and wings. Our studies show, for the very first time, that Streptomyces isolated from the marine environment and the Caatinga biome are effective at provoking the mortality of D. fovealis and are promising agents for developing new products with biological control properties.
Thesagro: | Actinomiceto; Bactéria não Patogênica; Caatinga; Controle Biológico; Praga de Planta.
Thesaurus Nal: | Actinobacteria; Biological control; Chitinase; Marine ecosystems; Metabolites; Plant pests; Streptomyces.
Categoria do assunto: | H Saúde e Patologia
Registro original: | Embrapa Meio Ambiente (CNPMA)
Exemplares: | CNPMA - (17128-1) - UPC - AP - DD -  -  -  - DIS