Seletividade de Inseticidas a Brevicoryne brassicae (L.) (Hemiptera: Aphididae) e ao Predador Doru luteipes (Scudder) (Dermaptera: Forficulidae)

Bacci, Leandro; Picanço, Marcelo Coutinho; Gusmão, Marcos Rafael; Crespo, André Luiz Barreto; Pereira, E. J. G.

doi:10.1590/s1519-566x2001000400028

Cited by 18 publications

(14 citation statements)

References 10 publications

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“…Differences for adult parasitoid (Table 1) Table 1 Impact of glyphosate and chlorpyrifos commercial products on parasitism activity and viability of Telenomus remus adults (emerged from non-treated pupae) directly exposed to dry residue on inert substrate 1 and 2 days after parasitoid emergence (DAE) (25 ± 2°C, 70 ± 10% RH, photoperiod of 14:10 h L/D). are probably due to the fact that, at this stage of development, the insect is more susceptible to pesticides when exposed to contamination by contact when moving on treated surfaces (Hassan 1992, Bacci et al 2001. Differently, the pupa is protected inside the chorion of the host egg and is usually reported as more tolerant to chemicals (Hassan 1992) if compared to the adult stage.…”

Section: Discussionmentioning

confidence: 99%

Side-Effects of Glyphosate to the Parasitoid Telenomus remus Nixon (Hymenoptera: Platygastridae)

et al. 2016

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The aim of this study was to compare the side-effects of glyphosate to the parasitoid Telenomus remus Nixon (Hymenoptera: Platygastridae) when parasitoids were exposed to this chemical at the pupal (inside host eggs) and adult stages. Bioassays were conducted under laboratory conditions according to the International Organization for Biological Control (IOBC) standard methods for testing side-effects of pesticides to egg parasitoids. Different glyphosate-based pesticides (Roundup Original®, Roundup Ready®, Roundup Transorb®, Roundup WG®, and Zapp Qi®) were tested at the same acid equivalent concentration. Treatments were classified following the IOBC toxicity categories as (1) harmless, (2) slightly harmful, (3) moderately harmful, and (4) harmful. When tested against T. remus adults, Roundup Original®, Roundup Ready®, Roundup Transorb®, and Roundup WG® reduced parasitism 2 days after parasitoid emergence, being classified as slightly harmful. Differently, when tested against T. remus pupae, all tested glyphosate-based products did not differ in their lethal effect and therefore did not reduce T. remus adult emergence or parasitism capacity, being classified as harmless. However, differences on sublethal toxicity were found. Parasitism of individuals emerging from parasitized eggs sprayed at the pupal stage of T. remus with Zapp Qi® was lower compared to control, but parasitism was still higher than 66%, and therefore, Zapp Qi® was still classified as harmless. In conclusion, all tested glyphosate-based products can be used in agriculture without negative impact to T. remus as none was classified as harmful or moderately harmful to this parasitoid when exposure occurred at the pupal or adult stages.

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Section: Discussionmentioning

confidence: 99%

Side-Effects of Glyphosate to the Parasitoid Telenomus remus Nixon (Hymenoptera: Platygastridae)

et al. 2016

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“…O método de aplicação no foco do ataque, e não na área total do talhão, bem como o fato de os ovos endofíticos de L. heveae não sofrerem influência das pulverizações, possivelmente sejam os fatores determinantes para garantir a manutenção da população do parasitoide na área, o que explicaria as altas taxas de parasitismo observadas. Os produtos fitossanitários aplicados não se demonstraram seletivos a outras espécies de predadores e parasitoides (Gusmão et al, 2000;Bacci et al,. 2001;Perioto et al, 2002) e, provavelmente, não os seriam a E. tingitiphagus.…”

Section: Resultsunclassified

Parasitismo de ovos de Leptopharsa heveae Drake & Poor por Erythmelus tingitiphagus (Soares) em plantios de seringueira com aplicação de produtos fitossanitários

Santos

2014

Rev. Ceres

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Parasitism of Leptopharsa heveae Drake & Poor eggs by Erythmelus tingitiphagus (Soares) in rubber tree plantations with application of pesticidesThe rubber tree lace bug, Leptopharsa heveae Drake & Poor (Hemiptera: Tingidae), is one of the main rubber tree crop pests in Brazil. It can cause loss of up to 30% in latex yield. The control is performed mainly with pesticides and one of the alternatives to their use is the utilization of natural enemies. The parasitoid Erythmelus tingitiphagus (Soares) (Hymenoptera: Mymaridae) has been shown to be an important natural enemy of L. heveae, parasitizing eggs of this pest in natural conditions. The aim of this study was to verify the occurrence and the parasitism of E. tingitiphagus on L. heveae eggs in commercial stands of five rubber tree clones which are regularly treated with pesticide, in the municipality of Itiquira, Mato Grosso State, Brazil. Weekly, between August 2006 and January 2007, four mature leaves were randomly sampled in five trees of the clones RRIM 600, PR 255, GT 1, PB 235 and PB 217. Parasitoids were found in all studied clones with populations peaking in October. The parasitism rate ranged from 13.8% in PB 235 to 30.8% in RRIM 600, with average of 24.2%. The application of pesticides in the stands had no negative effect onon parasitism of E. tingitiphagus.

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“…Exemplares das vespas estudadas foram coletadas, montadas e identificadas no Museu de Entomologia da UFV. Para instalação dos bioensaios, folhas de café da cultivar Catuaí foram imersas em caldas inseticidas por cinco segundos (Bacci et al 2001, Galvan et al 2002. As folhas foram postas para secar à sombra em um varal por duas horas.…”

Section: Methodsunclassified

Seletividade Fisiológica de Inseticidas a Vespas Predadoras (Hymenoptera: Vespidae) de Leucoptera coffeella (Lepidoptera: Lyonetiidae)

et al. 2009

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Conservation of natural enemies is an important component of integrated pest management. In this work, the selectivity of 11 insecticides used for management of Leucoptera coffeella (Guérin-Méneville) was studied to Protonectarina sylveirae (Saussure), Polybia scutellaris (White) and Protopolybia exigua (Saussure) (Hymenoptera: Vespidae). The insecticides were applied in concentrations corresponding to 50% and 100% of the field rates used for management of L. coffeella. The organophosphates (except to the 50% rate of ethion to P. scutellaris) were highly toxic to all three Vespidae species. Cartap was highly toxic to P. escutellaris and P. exigua but showed median selectivity to P. sylveirae. The pyrethroids cypermethrin, deltamethrin, betacyfluthrin, zetacypermethrin, and esfenvalerate were selective to at least one of wasp species. The mortality of P. scutelaris caused by ethion, cypermethrin, deltamethrin, betacyfluthrin and zetacypermethrin decreased when 50% of the recommended rates were used. This reduction was also observed for the mortality of P. exigua by permethrin and for the mortality of P. sylveirae by deltamethrin. P. sylveirae was the most tolerant species to cartap; P. scutellaris was the most tolerant to ethion, while P. exigua was more tolerant to pyrethroids than P. scutellaris and P. sylveirae. The results of this research indicate that pyrethroid insecticides are likely to be selective to predatory wasps in field settings given their overall selectivity in the conditions of extreme exposure of this study. The possible mechanisms underlying the selectivity of these compounds and the differential tolerance of the wasps are discussed.KEY WORDS -Coffee leafminer, wasps, Protonectarina sylveirae, Polybia scutellaris, Protopolybia exigua.RESUMO -A conservação de inimigos naturais é um componente importante no manejo integrado de pragas. Neste trabalho, estudou-se a seletividade de 11 inseticidas usados para manejar Leucoptera coffeella (Guérin-Méneville) aos predadores Protonectarina sylveirae (Saussure), Polybia scutellaris (White) e Protopolybia exigua (Saussure) (Hymenoptera: Vespidae). Os inseticidas foram empregados em concentrações que correspondem a 50% e 100% da dosagem utilizada para o manejo de L. coffeella. Os organofosforados (exceto a subdose do etiom a P. scutellaris) foram altamente tóxicos aos três Vespidae estudados. Cartape não apresentou seletividade em favor de P. escutellaris e P. exigua, mas foi medianamente tóxico a P. sylveirae. Os piretróides cipermetrina, deltametrina, betaciflutrina, zetacipermetrina e esfenvalerato foram seletivos a pelo menos uma espécie de Vespidae estudada. As mortalidades causadas por etiom, cipermetrina, deltametrina, betaciflutrina e zetacipermetrina a P. scutellaris decresceram quando se utilizou metade das doses. Essa redução na mortalidade também foi observada para permetrina em P. exigua e para deltametrina em P. sylveirae. P. sylveirae foi mais tolerante ao cartape do que P. scutellaris e P. exigua. A vespa P. scutellaris foi mais tolerante ao...

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Seletividade de Inseticidas a Brevicoryne brassicae (L.) (Hemiptera: Aphididae) e ao Predador Doru luteipes (Scudder) (Dermaptera: Forficulidae)

Cited by 18 publications

References 10 publications

Side-Effects of Glyphosate to the Parasitoid Telenomus remus Nixon (Hymenoptera: Platygastridae)

Side-Effects of Glyphosate to the Parasitoid Telenomus remus Nixon (Hymenoptera: Platygastridae)

Parasitismo de ovos de Leptopharsa heveae Drake & Poor por Erythmelus tingitiphagus (Soares) em plantios de seringueira com aplicação de produtos fitossanitários

Seletividade Fisiológica de Inseticidas a Vespas Predadoras (Hymenoptera: Vespidae) de Leucoptera coffeella (Lepidoptera: Lyonetiidae)

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