Toxicity to, oviposition and population growth impairments of Callosobruchus maculatus exposed to clove and cinnamon essential oils.

Autor: Viteri Jumbo LO; Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil.; Embrapa Tabuleiros Costeiros, Aracaju, SE, Brazil., Haddi K; Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Faroni LRD; Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Heleno FF; Departamento de Engenharia Agrícola, Universidade Federal de Viçosa, Viçosa, MG, Brazil., Pinto FG; Departamento de Química, Universidade Federal de Viçosa, Campus Rio Paranaíba, MG, Brazil., Oliveira EE; Departamento de Entomologia, Universidade Federal de Viçosa, Viçosa, MG, Brazil.
Jazyk: angličtina
Zdroj: PloS one [PLoS One] 2018 Nov 16; Vol. 13 (11), pp. e0207618. Date of Electronic Publication: 2018 Nov 16 (Print Publication: 2018).
DOI: 10.1371/journal.pone.0207618
Abstrakt: The use of plant essential oils has been shown to efficiently control insect pests of stored beans, significantly reducing the threats associated with synthetic insecticides. Here, we evaluated the potential of applications of essential oils of clove, Syzygium aromaticum L., and cinnamon, Cinnamomum zeylanicum L., to control Callosobruchus maculatus, considered as one of the most cosmopolitan pests of stored beans. Using four combinations of couples (i.e., unexposed couples, exposed females, exposed males, and exposed couples), we also evaluated how sublethal exposure to these essential oils impacted C. maculatus oviposition. Bioassays results revealed that both essential oils exhibited insecticidal activities similar to the synthetic pyrethroid insecticide deltamethrin. Furthermore, oil dosage increments proportionately decreased the growth rate and reduced the losses in bean weight caused by cowpea weevils, and offspring emergence was almost abolished when parents were exposed to the LD20 of each essential oil. Finally, significant oviposition impairments were perceived only in couples where females were exposed (i.e., females exposed and exposed couples) to the LD20 of cinnamon and clove essential oils. Thus, by exhibiting similar insecticidal activities as synthetic insecticides and by significantly affecting the oviposition of sublethally exposed C. maculatus females, the cinnamon and clove essential oils represent valuable tools with potential of integration into the management of C. maculatus infestations.
Competing Interests: The authors have declared that no competing interests exist.
Databáze: MEDLINE
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