Parasitismo natural em ovos crisopídeos

Medeiros, Maria Alice de

doi:10.1590/s0103-84782009000100034

Cited by 2 publications

(4 citation statements)

References 9 publications

(5 reference statements)

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“…The adults of the parasitoids were collected using gelatin capsules 00 Medeiros (2009). After capture, the adults were released next to plants of Euphorbia pulcherrima Wild to be colonized containing nymphs of 3rd and 4th instars of B. tabaci.…”

Section: Rearing Of Whitefly and Parasitoidmentioning

confidence: 99%

“…For the bioassay, the leaves of both cotton cultivars containing pupae of E. hispida were collected and transferred to the laboratory. Within 12 h of the parasitoids emerging, they were collected in gelatin capsules 00 (MEDEIROS, 2009) and subjected to the residual contact method proposed by Ozawa, Saito and Ikeda (1998) to determine the mortality rate of the insect. The same insecticides were used for the adult stage of the parasitoid, diluted in acetone (99.5%).…”

Section: Mortality Rate Of Adult E Hispidamentioning

confidence: 99%

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SELECTIVITY OF INSECTICIDES TO Encarsia hispida (Hymenoptera: Aphelinidae)

et al. 2019

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The use of non-selective insecticides in agricultural production can reduce or eliminate biological agents that regulate insects that are undesirable to humans in production processes. Here, the toxicity of synthetic products on the parasitoid Encarsia hispida was evaluated, the host of which is the whitefly, Bemisia tabaci biotype B, found on cotton plants. The study was carried out using bioassays, in a completely randomized design in a factorial scheme. Pupae and adults of E. hispida were used in the bioassays, which had been sprayed with various chemicals (thiamethoxam, deltamethrin, imidacloprid, and pyriproxyfen) at different concentrations (1.0 g L -1 , 1.0 mL L -1 , 4.0 mL L -1 , and 2.5 mL L -1 ). The control treatment was distilled water. Chemicals were topically placed in the dorsal region of the tegument of 1 and 3-day old pupae. Then, between 1 and 15-days of emergence of adult parasitoids, residual contact bioassay were used to determine the toxicity of the insecticides. The insecticides thiamethoxam and imidacloprid were harmless to the pupal stage of E. hispida, but were harmful to the adult stage. The insecticides deltamethrin and pyriproxyfen were harmful to both pupal and adult stages of E. hispida. SELETIVIDADE DE INSETICIDAS A Encarsia hispida (Hymenoptera: Aphelinidae)RESUMO -O uso de inseticidas não seletivos na produção agrícola pode reduzir ou eliminar agentes biológicos que regulam os insetos indesejáveis para o homem no processo produtivo. Neste estudo, o efeito da toxicidade de produtos sintéticos foi avaliado para o parasitoide Encarsia hispida tendo como hospedeiro a mosca-branca, Bemisia tabaci biótipo B, em algodoeiro. O estudo foi realizado através do uso de bioensaios, usando-se delineamento inteiramente casualizado em esquema fatorial. Nos bioensaios foram utilizadas pupas e adultos de E. hispida, as quais foram submetidas à pulverização com os seguintes produtos químicos: tiametoxam, deltametrina, imidacloprido e piriproxifem, nas proporções de 1,0 g L -1 , 1,0 mL L -1 , 4,0 mL L -1 e 2,5 mL L -1 , respectivamente, e um tratamento controle (água destilada). Foram utilizadas pupas com 1 e 3 dias de idade para exposição tópica, mediante aplicação na região dorsal do tegumento. Nos adultos do parasitoide, com idade de 1 e 15 dias de emergência, foram utilizados um bioensaio de contato residual para determinação da toxicidade dos inseticidas. Os inseticidas tiametoxam e imidacloprido são inócuos ao estágio de pupa, no entanto, os mesmos são nocivos à fase adulta de E. hispida. Os inseticidas deltametrina e piriproxifem são nocivos para ambas fases pupal e adulta de E. hispida.Palavras-chave: Gossypium hirsutum. Mosca-branca. Parasitoide. Agrotóxicos.

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Section: Rearing Of Whitefly and Parasitoidmentioning

confidence: 99%

Section: Mortality Rate Of Adult E Hispidamentioning

confidence: 99%

SELECTIVITY OF INSECTICIDES TO Encarsia hispida (Hymenoptera: Aphelinidae)

et al. 2019

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“…Female parasitoids were collected from poinsettia using 00 gelatin capsules (Medeiros, 2009) released among poinsettia plants that would be colonized. They contained whitefly nymphs in their 3 rd and 4 th instars in the above-mentioned environment.…”

Section: Rearing Of E Hispidamentioning

confidence: 99%

“…For the oviposition of the parasitoid, one individual with up to 24 h of age fed with honey was used. It was collected and released using 00 gelatin capsules (Medeiros, 2009) in clip cages (2.0 cm), allowing contact with the hosts for 24 h. After oviposition, parasitized nymphs were daily recorded using stereomicroscopy through the cuticle of whitefly nymph. Upon reaching the pupal stage, they were removed with an entomological pin and placed in containers (9.0 × 1.5 cm) waiting for the emergence of the parasitoid.…”

Section: Development Of E Hispida On Bemisia Tabaci Biotype B In Cottonmentioning

confidence: 99%

Development and parasitism of Encarsia hispida (Hymenoptera: Aphelinidae) on Bemisia tabaci biotype B in cotton

Oliveira¹,

Oliveira²,

Souza³

et al. 2016

Afr. J. Agric. Res.

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The biological control of pests is essential for the use of Integrated Pest Management in agricultural environments. In this context, the objective of this study was to identify biological parameters and quantify the parasitism index of Encarsia hispida on Bemisia tabaci biotype B nymphs in cotton plants. The research was conducted at the Entomology Laboratory of the Federal University of Paraíba, in Areia, Paraíba State, Brazil. For the first bioassay, the treatments consisted of cotton cultivars BRS H8 and BRS Topázio to evaluate the biological development of the parasitoid in its host. In the second bioassay, these cultivars were used to assess the impact of the biological agent in a greenhouse. In the first experiment, there were only female parasitoids with longevity of 24.61 and 22.61 days in BRS H8 and BRS Topázio, respectively. However, they were not statistically different. The life cycle of the parasitoid (egg to adult) was 35.68 and 33.71 days in BRS H8 and BRS Topázio, respectively, and they did not differ from each other. In the second bioassay, there were E. hispida parasitism indexes around 34.33 and 29.63% in BRS H8 and BRS Topázio, respectively. The parasitoid E. hispida develops properly when the nymphs of the host were from the two cotton cultivars. The parasitoid E. hispida has an application potential in the biological control of B. tabaci biotype B whiteflies.

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Parasitismo natural em ovos crisopídeos

Abstract: RESUMO Os predadores, em geral, apresentam hábitos generalistas e por isso podem ser usados em programas de

Cited by 2 publications

References 9 publications

SELECTIVITY OF INSECTICIDES TO Encarsia hispida (Hymenoptera: Aphelinidae)

SELECTIVITY OF INSECTICIDES TO Encarsia hispida (Hymenoptera: Aphelinidae)

Development and parasitism of Encarsia hispida (Hymenoptera: Aphelinidae) on Bemisia tabaci biotype B in cotton

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