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Selectivity assessment of two biorational insecticides, azadirachtin and pyriproxyfen, in comparison to a neonicotinoid, acetamiprid, on pupae and adults of a Neotropical strain Eretmocerus mundus Mercet

dc.contributor.authorFrancesena, Natalia
dc.contributor.authorSchneider, Marcela Inés
dc.date.issued2018
dc.descriptionFil: Francesena, Natalia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Fil: Francesena, Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina.
dc.descriptionFil: Schneider, Marcela Inés. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina.
dc.description.abstractAssessment of the susceptibility of natural enemies of pests to selective pesticides is relevant for a sustainable agriculture with low impact on the environment. The aim of this study was to assess the toxicity of two biorational insecticides, azadirachtin and pyriproxyfen in comparison to a neonicotinoid insecticide, acetamiprid, on pupae and adults of a Neotropical strain of Eretmocerus mundus. Adult emergence and survival were evaluated as lethal effects whereas the sublethal effects were assessed through the reproductive capacity, sex ratio, and longevity of the surviving first progeny. Adult emergence from treated pupae was reduced by all three insecticides, but azadirachtin at its maximum field recommended concentration (MFRC) proved the most toxic insecticide. The survival probability of emerged adults was reduced by the three insecticides below than 50% from 2 to 5 days after the adult emergence. Malformations in nonemerged adults from treated pupal hosts were observed at the MFRC of all three insecticides. Sublethal effects on survivors from pupal treatment could be evaluated at only the lowest azadirachtin concentration. At that concentration, though azadirachtin did not affect the reproductive capacity of females, the sex ratio and the longevity of the first progeny were disrupted. The survival of parasitoid adults after adult exposure was reduced by all three insecticides, pyriproxyfen at the MFRC being the most toxic. All insecticides at their half of MFRCs induced sublethal effects in the survivors’ adults, with pyriproxyfen being the most harmful to the reproductive capacity of females. In conclusion, both biorational insecticides were toxic to E. mundus.
dc.formatapplication/pdf
dc.identifier.doihttps://doi.org/10.1016/j.chemosphere.2018.05.010 Get rights and content
dc.identifier.urihttps://naturalis.fcnym.unlp.edu.ar/handle/628872547/57973
dc.language.isoeng
dc.sourceChemosphere. 2018;206:349-358
dc.subjectPesticides
dc.subjectLethal effects
dc.subjectSublethal effects
dc.subjectNatural enemies
dc.subjectParasitoid
dc.titleSelectivity assessment of two biorational insecticides, azadirachtin and pyriproxyfen, in comparison to a neonicotinoid, acetamiprid, on pupae and adults of a Neotropical strain Eretmocerus mundus Mercet
dc.typeArtículo
dspace.entity.typePublication
relation.isAuthorOfPublication18d38675-1329-4e50-acc1-663bf22d9d7d
relation.isAuthorOfPublication08ce18ea-56c9-4b7e-9b66-8ba9d471fbbc
relation.isAuthorOfPublication.latestForDiscovery18d38675-1329-4e50-acc1-663bf22d9d7d

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