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Risk Assessment of Two Insecticides on Encarsia formosa, Parasitoid of Whitefly Bemisia tabaci

The assessment of acute toxicity to insect natural enemies is very important for insecticide selection used within integrated pest management (IPM). The acute toxicity of abamectin and imidacloprid against Encarsia formosa, a parasitoid of Bemisia tabaci, was investigated. Abamectin had a high toxic...

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Autores principales: He, Zhan, Liu, Yuan, Wang, Lei, Guo, Qiu, Ali, Shaukat, Chen, Xiao-Sheng, Qiu, Bao-Li
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6164281/
https://www.ncbi.nlm.nih.gov/pubmed/30208565
http://dx.doi.org/10.3390/insects9030116
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author He, Zhan
Liu, Yuan
Wang, Lei
Guo, Qiu
Ali, Shaukat
Chen, Xiao-Sheng
Qiu, Bao-Li
author_facet He, Zhan
Liu, Yuan
Wang, Lei
Guo, Qiu
Ali, Shaukat
Chen, Xiao-Sheng
Qiu, Bao-Li
author_sort He, Zhan
collection PubMed
description The assessment of acute toxicity to insect natural enemies is very important for insecticide selection used within integrated pest management (IPM). The acute toxicity of abamectin and imidacloprid against Encarsia formosa, a parasitoid of Bemisia tabaci, was investigated. Abamectin had a high toxicity risk to E. formosa, while imidacloprid showed a medium toxicity risk. When treated with the lethal concentration 30 (LC(30)) of abamectin, the dwelling time of E. formosa in B. tabaci infested-plant-area (IPA) was significantly lower than in non-infested plant areas (non-IPA). In addition, the frequency of E. formosa entering into the two areas was not significantly different in the LC(10) and LC(30) treatments. Within the IPA, LC(10), and LC(30) treatments decreased the dwelling time and entering frequency of parasitoid significantly. For imidacloprid treatments, E. formosa stayed a longer time in the non-IPA than in the IPA when treated with LC(30.) The frequency of E. formosa entering into the two areas was only slightly different in the LC(1), LC(10), and LC(30) treatments. Within the IPA, LC(10) and LC(30) treatments were significantly decreased in the dwelling time and the entering frequency of E. formosa. The results indicate that abamectin and imidacloprid have high or medium acute toxicity against E. formosa and a negative sublethal effect on its searching behaviour.
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spelling pubmed-61642812018-10-10 Risk Assessment of Two Insecticides on Encarsia formosa, Parasitoid of Whitefly Bemisia tabaci He, Zhan Liu, Yuan Wang, Lei Guo, Qiu Ali, Shaukat Chen, Xiao-Sheng Qiu, Bao-Li Insects Article The assessment of acute toxicity to insect natural enemies is very important for insecticide selection used within integrated pest management (IPM). The acute toxicity of abamectin and imidacloprid against Encarsia formosa, a parasitoid of Bemisia tabaci, was investigated. Abamectin had a high toxicity risk to E. formosa, while imidacloprid showed a medium toxicity risk. When treated with the lethal concentration 30 (LC(30)) of abamectin, the dwelling time of E. formosa in B. tabaci infested-plant-area (IPA) was significantly lower than in non-infested plant areas (non-IPA). In addition, the frequency of E. formosa entering into the two areas was not significantly different in the LC(10) and LC(30) treatments. Within the IPA, LC(10), and LC(30) treatments decreased the dwelling time and entering frequency of parasitoid significantly. For imidacloprid treatments, E. formosa stayed a longer time in the non-IPA than in the IPA when treated with LC(30.) The frequency of E. formosa entering into the two areas was only slightly different in the LC(1), LC(10), and LC(30) treatments. Within the IPA, LC(10) and LC(30) treatments were significantly decreased in the dwelling time and the entering frequency of E. formosa. The results indicate that abamectin and imidacloprid have high or medium acute toxicity against E. formosa and a negative sublethal effect on its searching behaviour. MDPI 2018-09-11 /pmc/articles/PMC6164281/ /pubmed/30208565 http://dx.doi.org/10.3390/insects9030116 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
He, Zhan
Liu, Yuan
Wang, Lei
Guo, Qiu
Ali, Shaukat
Chen, Xiao-Sheng
Qiu, Bao-Li
Risk Assessment of Two Insecticides on Encarsia formosa, Parasitoid of Whitefly Bemisia tabaci
title Risk Assessment of Two Insecticides on Encarsia formosa, Parasitoid of Whitefly Bemisia tabaci
title_full Risk Assessment of Two Insecticides on Encarsia formosa, Parasitoid of Whitefly Bemisia tabaci
title_fullStr Risk Assessment of Two Insecticides on Encarsia formosa, Parasitoid of Whitefly Bemisia tabaci
title_full_unstemmed Risk Assessment of Two Insecticides on Encarsia formosa, Parasitoid of Whitefly Bemisia tabaci
title_short Risk Assessment of Two Insecticides on Encarsia formosa, Parasitoid of Whitefly Bemisia tabaci
title_sort risk assessment of two insecticides on encarsia formosa, parasitoid of whitefly bemisia tabaci
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6164281/
https://www.ncbi.nlm.nih.gov/pubmed/30208565
http://dx.doi.org/10.3390/insects9030116
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