Toxicity of some insecticides used in maize crop on trichogramma pretiosum (hymenoptera, trichogrammatidae) immature stages

dc.creatorSouza, Jander R.
dc.creatorCarvalho, Geraldo A.
dc.creatorMoura, Alexandre P.
dc.creatorCouto, Marcelo H. G.
dc.creatorMaia, Jader B.
dc.date2019-10-15T13:36:48Z
dc.date2019-10-15T13:36:48Z
dc.date2014
dc.date.accessioned2023-09-28T19:59:49Z
dc.date.available2023-09-28T19:59:49Z
dc.identifierSOUZA, J. R. et al. Toxicity of some insecticides used in maize crop on trichogramma pretiosum (hymenoptera, trichogrammatidae) immature stages. Chilean Journal of Agricultural Research, Chillán, v. 74, n. 2, Apr./June 2014.
dc.identifierhttp://repositorio.ufla.br/jspui/handle/1/37233
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/9041937
dc.descriptionFall armyworm Spodoptera frugiperda (J.E. Smith, 1797) (Lepidoptera: Noctuidae) is an important pest of maize (Zea mays L.) crops in Brazil. The effects of beta-cypermethrin, chlorfenapyr, chlorpyrifos, spinosad, etofenprox, triflumuron, alpha-cypermethrin/teflubenzuron, and lambda-cyhalothrin/thiamethoxam on Trichogramma pretiosum Riley, 1879 (Hymenoptera: Trichogrammatidae) immature stages were evaluated. Eggs of Anagasta kuehniella (Zeller, 1879) (Lepidoptera: Pyralidae), containing immature stages of the parasitoid were dipped in water solution pesticides, to evaluate their effects on emergence and sex ratio of F1 parasitoids. For F2 parasitoids, emergence, parasitism capacity, and sex ratio were evaluated. Beta-cypermethrin, chlorfenapyr, chlorpyrifos, and spinosad affected the emergence success of F1 T. pretiosum. Insects exposed to etofenprox and alpha-cypermethrin/teflubenzuron during the egg-larval period and to lambda-cyhalothrin/thiamethoxam during the pupal stage also suffered reduction in the emergence. Beta-cypermethrin affected the sex ratio of F1 T. pretiosum from host eggs treated during the egg-larval period; spinosad affected it during the egg-larval period and the pupal stage, whereas chlorpyrifos did the same when applied during the pupal stage. Chlorpyrifos also affected the sex ratio of F2 parasitoids, but only when applied during the egg-larval period, whereas chlorfenapyr reduced this trait when applied during the pre-pupal phase. Chlorpyrifos and alpha-cypermethrin/teflubenzuron affected the parasitism capacity of F1 females from eggs treated during the egg-larval period. Considering the overall effects, only etofenprox and triflumuron were selective on T. pretiosum when applied on parasitized A. kuehniella eggs. Further studies need to be carried out to verify the toxicity of the other pesticides under semi-field and field conditions.
dc.formatapplication/pdf
dc.languageen_US
dc.publisherInstituto de Investigaciones Agropecuarias
dc.rightsAttribution-NonCommercial 4.0 International
dc.rightsacesso aberto
dc.rightshttp://creativecommons.org/licenses/by-nc/4.0/
dc.sourceChilean Journal of Agricultural Research
dc.subjectAnagasta kuehniella
dc.subjectBiological control
dc.subjectNatural enemies
dc.subjectSelectivity
dc.subjectZea mays
dc.titleToxicity of some insecticides used in maize crop on trichogramma pretiosum (hymenoptera, trichogrammatidae) immature stages
dc.typeArtigo


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