SELECTIVITY OF INSECTICIDES TO Encarsia hispida (Hymenoptera: Aphelinidae)
ABSTRACT 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.
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Universidade Federal Rural do Semi-Árido
2019
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oai:scielo:S1983-212520190002003122019-07-16SELECTIVITY OF INSECTICIDES TO Encarsia hispida (Hymenoptera: Aphelinidae)OLIVEIRA,ROBÉRIO DESOUZA,MILENY DOS SANTOS DENUNES,GILMAR DA SILVABATISTA,JACINTO DE LUNABRITO,CARLOS HENRIQUE DE Gossypium hirsutum Whitefly Parasitoid Pesticides ABSTRACT 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.info:eu-repo/semantics/openAccessUniversidade Federal Rural do Semi-ÁridoRevista Caatinga v.32 n.2 20192019-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-21252019000200312en10.1590/1983-21252019v32n203rc |
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OLIVEIRA,ROBÉRIO DE SOUZA,MILENY DOS SANTOS DE NUNES,GILMAR DA SILVA BATISTA,JACINTO DE LUNA BRITO,CARLOS HENRIQUE DE |
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OLIVEIRA,ROBÉRIO DE SOUZA,MILENY DOS SANTOS DE NUNES,GILMAR DA SILVA BATISTA,JACINTO DE LUNA BRITO,CARLOS HENRIQUE DE SELECTIVITY OF INSECTICIDES TO Encarsia hispida (Hymenoptera: Aphelinidae) |
author_facet |
OLIVEIRA,ROBÉRIO DE SOUZA,MILENY DOS SANTOS DE NUNES,GILMAR DA SILVA BATISTA,JACINTO DE LUNA BRITO,CARLOS HENRIQUE DE |
author_sort |
OLIVEIRA,ROBÉRIO DE |
title |
SELECTIVITY OF INSECTICIDES TO Encarsia hispida (Hymenoptera: Aphelinidae) |
title_short |
SELECTIVITY OF INSECTICIDES TO Encarsia hispida (Hymenoptera: Aphelinidae) |
title_full |
SELECTIVITY OF INSECTICIDES TO Encarsia hispida (Hymenoptera: Aphelinidae) |
title_fullStr |
SELECTIVITY OF INSECTICIDES TO Encarsia hispida (Hymenoptera: Aphelinidae) |
title_full_unstemmed |
SELECTIVITY OF INSECTICIDES TO Encarsia hispida (Hymenoptera: Aphelinidae) |
title_sort |
selectivity of insecticides to encarsia hispida (hymenoptera: aphelinidae) |
description |
ABSTRACT 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. |
publisher |
Universidade Federal Rural do Semi-Árido |
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2019 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1983-21252019000200312 |
work_keys_str_mv |
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