Toxicity of insecticides used in rice crop on the egg parasitoid Trichogramma pretiosum (Hymenoptera: Trichogrammatidae) under field conditions

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Federal de Pernambuco (UFPE)-
Autor(es): dc.contributorCtr Ensino Super Riograndense CESURG-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorRakes, Matheus-
Autor(es): dc.creatorPasini, Rafael Antonio-
Autor(es): dc.creatorMorais, Maira Chagas-
Autor(es): dc.creatorAraujo, Mikael Bolke-
Autor(es): dc.creatorMalaquias, Jose Bruno-
Autor(es): dc.creatorBernardi, Daniel-
Autor(es): dc.creatorGrutzmacher, Anderson Dionei-
Data de aceite: dc.date.accessioned2025-08-21T22:28:58Z-
Data de disponibilização: dc.date.available2025-08-21T22:28:58Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2022-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1590/0103-8478cr20220055-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/245468-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/245468-
Descrição: dc.descriptionWe evaluated under field conditions the toxicity of insecticides previously identified as harmful in laboratory and semifield bioassays on the parasitoid Trichogramma pretiosum (Hymenoptera: Trichogrammatidae). The experiments were conducted during the 2019/20 and 2020/21 harvests in rice fields. Following the recommendations of the International Organization for Biological and Integrated Control (IOBC), four insecticides were applied in 64 m2 experimental plots. Subsequently, T. pretiosum was released inundatively. To verify parasitism rates, at 1, 2, 4 and 6 days after release (DAR) of the parasitoids, eggs from the host Ephestia kuehniella (Lepidoptera: Pyralidae) were offered. After determining the number of parasitized eggs, the data were grouped into a reduction coefficient (Ex) to provide a single result for the effects of the insecticides on parasitoid. For both the 2019/20 and 2020/21 evaluated crops, it was found that at 2 DAR, the highest parasitism rates occurred. In contrast, in 6 DAR, no parasitism rates were observed. Lambda-cyhalothrin, thiamethoxam, and zeta-cypermethrin were classified as moderately harmful; thiamethoxam + lambda-cyhalothrin was classified as harmful. Following IOBC guidelines, the toxicity of these products under field conditions is lower than that obtained in the laboratory or semi-field for the T. pretiosum. However, these insecticides should be avoided, or used at times that do not coincide with the release or presence of the parasitoid in the field.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Cient�fico e Tecnol�gico (CNPq)-
Descrição: dc.descriptionCoordena��o de Aperfei�oamento de Pessoal de N�vel Superior (CAPES)-
Descrição: dc.descriptionUniv Fed Pelotas UFPel, Dept Fitossanidade, BR-96001970 Pelotas, RS, Brazil-
Descrição: dc.descriptionCtr Ensino Super Riograndense CESURG, Sarandi, RS, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista UNESP, Dept Bioestat, Botucatu, SP, Brazil-
Descrição: dc.descriptionUniv Estadual Paulista UNESP, Dept Bioestat, Botucatu, SP, Brazil-
Formato: dc.format8-
Idioma: dc.languageen-
Publicador: dc.publisherUniv Federal Santa Maria-
Relação: dc.relationCiencia Rural-
???dc.source???: dc.sourceWeb of Science-
Palavras-chave: dc.subjectbiological control-
Palavras-chave: dc.subjectchemical control-
Palavras-chave: dc.subjectintegrated pest management-
Palavras-chave: dc.subjectnatural enemies-
Palavras-chave: dc.subjectpesticide selectivity-
Título: dc.titleToxicity of insecticides used in rice crop on the egg parasitoid Trichogramma pretiosum (Hymenoptera: Trichogrammatidae) under field conditions-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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