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dc.contributor.author
Romei, Francisco
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dc.contributor.author
Schilman, Pablo Ernesto
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dc.date.available
2024-04-19T11:30:24Z
dc.date.issued
2024-02
dc.identifier.citation
Romei, Francisco; Schilman, Pablo Ernesto; Diatomaceous earth as insecticide: physiological and morphological evidence of its underlying mechanism; John Wiley & Sons Ltd; Pest Management Science; 2-2024; 1-7
dc.identifier.issn
1526-498X
dc.identifier.uri
http://hdl.handle.net/11336/233526
dc.description.abstract
BACKGROUND: Wheat grain containers or silos can be perfect habitats for insects, which generate large economic losses to grain production. Natural alternatives to synthetic insecticides had grown in popularity because of health, economic and ecological issues. Diatomaceous earth is a natural compound that has insecticide effect by enhancing insect´s dehydration with no toxicity on mammals including humans. The aim of this study is to confirm the effect of diatomaceous earth as insecticide for the wheat grain pest, the red flour beetle Tribolium castaneum (Coleoptera: Tenebrionidae) and demonstrate its underlying mechanisms as insecticide by open-flow respirometry, and Scanning Electron Microscopy.RESULTS: Survival bioassays of T. castaneum revealed a dose-dependent insecticide effect of diatomaceous earth. Gravimetric measurements showed that 2 days exposure to diatomaceous earth produce a significant increase of mass loss. Open-flow respirometry measurements showed an increase of total water emission rate on insects due to an increase of both, respiratory and cuticular water loss. Our study revealed that diatomaceous earth produces an increase of insect´s cuticle permeability, which is responsible of elevated cuticular water loss. Scanning Electron Microscopy images provided visual evidence of the lipid absorbent properties of diatomaceous earth particles, and showed a tendency to higher, although not significant, damaged area of the cuticle´s surface from diatomaceous earth treated insects compared to control ones.CONCLUSION: With state-of-the art techniques like open-flow respirometry and Scanning Electron Microscopy, we demonstrated the underlying mechanism of diatomaceous earth as insecticide and provided new cues for understanding cuticle’s properties and its ecological importance.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
John Wiley & Sons Ltd
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Red flour beetle
dc.subject
open-flow respirometry
dc.subject
water loss rate
dc.subject
cuticular permeability
dc.subject
wheat grain
dc.subject
metabolic rate
dc.subject.classification
Zoología, Ornitología, Entomología, Etología
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Diatomaceous earth as insecticide: physiological and morphological evidence of its underlying mechanism
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-04-15T15:06:03Z
dc.journal.pagination
1-7
dc.journal.pais
Reino Unido
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dc.description.fil
Fil: Romei, Francisco. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina
dc.description.fil
Fil: Schilman, Pablo Ernesto. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Biodiversidad y Biología Experimental y Aplicada. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Biodiversidad y Biología Experimental y Aplicada; Argentina
dc.journal.title
Pest Management Science
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1002/ps.8033
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