Field-Based Evaluation of Insecticide Effectiveness on <i>Megalurothrips usitatus</i> in Guangdong, China: Implications for Pest Control Strategies
In southern China, cowpea production is severely threatened by <i>Megalurothrips usitatus</i> due to its fast-evolving resistance to insecticides. The toxicity monitoring of commonly used insecticides against field populations provides key information for the resistance management of pes...
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2025-04-01
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| Series: | Insects |
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| author | Zhengke Peng Mengni Li Chaosong Guo Huixin Zheng Mingyue Wu Fei Yin Yong Xiao Huanhuan Wang Xiangyi Kong Myron P. Zalucki Wen Xie Zhenyu Li |
| author_facet | Zhengke Peng Mengni Li Chaosong Guo Huixin Zheng Mingyue Wu Fei Yin Yong Xiao Huanhuan Wang Xiangyi Kong Myron P. Zalucki Wen Xie Zhenyu Li |
| author_sort | Zhengke Peng |
| collection | DOAJ |
| description | In southern China, cowpea production is severely threatened by <i>Megalurothrips usitatus</i> due to its fast-evolving resistance to insecticides. The toxicity monitoring of commonly used insecticides against field populations provides key information for the resistance management of pests. In this study, field populations of <i>Megalurothrips usitatus</i> were collected from three locations (QY, YF, MM) in Guangdong, and the sensitivity of these populations against insecticides was determined by using a thrips insecticides bioassay system (TIBS) method. The bioassay results indicated there were sensitivity variances to insecticides between these three field populations. Among these 10 insecticides, spinetoram and spinosad both showed high toxicity against all three field populations. In addition, broflanilide for QY, emamectin benzoate for YF, and emamectin benzoate and cyantraniliprole for MM were suggested as alternate insecticides to alleviate selective pressure from insecticides on field populations. In field experiments, the corrected control efficacy of cyantraniliprole and spinetoram against <i>M. usitatus</i> was over 75% at 7 dpa, which proved to be ideal insecticides for field application. These field-based results provide guidance for chemical control against thrips and can be valuable in proposing appropriate strategies for thrips resistance management. |
| format | Article |
| id | doaj-art-8a090dfe403d4583843b45981dbc1998 |
| institution | DOAJ |
| issn | 2075-4450 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Insects |
| spelling | doaj-art-8a090dfe403d4583843b45981dbc19982025-08-20T03:14:41ZengMDPI AGInsects2075-44502025-04-0116545910.3390/insects16050459Field-Based Evaluation of Insecticide Effectiveness on <i>Megalurothrips usitatus</i> in Guangdong, China: Implications for Pest Control StrategiesZhengke Peng0Mengni Li1Chaosong Guo2Huixin Zheng3Mingyue Wu4Fei Yin5Yong Xiao6Huanhuan Wang7Xiangyi Kong8Myron P. Zalucki9Wen Xie10Zhenyu Li11Institute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, ChinaInstitute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, ChinaInstitute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, ChinaKey Laboratory of Green Control of Crop Pests in Hunan Higher Education, Hunan University of Humanities, Science and Technology, Loudi 417000, ChinaSanya Academy of Tropical Agricultural Sciences, Sanya 572000, ChinaInstitute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, ChinaInstitute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, ChinaInstitute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, ChinaSanya Academy of Tropical Agricultural Sciences, Sanya 572000, ChinaSchool of the Environment, The University of Queensland, St. Lucia, QLD 4072, AustraliaState Key Laboratory of Vegetable Biobreeding, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081, ChinaInstitute of Plant Protection, Guangdong Academy of Agricultural Sciences, Key Laboratory of Green Prevention and Control on Fruits and Vegetables in South China Ministry of Agriculture and Rural Affairs, Guangdong Provincial Key Laboratory of High Technology for Plant Protection, Guangzhou 510640, ChinaIn southern China, cowpea production is severely threatened by <i>Megalurothrips usitatus</i> due to its fast-evolving resistance to insecticides. The toxicity monitoring of commonly used insecticides against field populations provides key information for the resistance management of pests. In this study, field populations of <i>Megalurothrips usitatus</i> were collected from three locations (QY, YF, MM) in Guangdong, and the sensitivity of these populations against insecticides was determined by using a thrips insecticides bioassay system (TIBS) method. The bioassay results indicated there were sensitivity variances to insecticides between these three field populations. Among these 10 insecticides, spinetoram and spinosad both showed high toxicity against all three field populations. In addition, broflanilide for QY, emamectin benzoate for YF, and emamectin benzoate and cyantraniliprole for MM were suggested as alternate insecticides to alleviate selective pressure from insecticides on field populations. In field experiments, the corrected control efficacy of cyantraniliprole and spinetoram against <i>M. usitatus</i> was over 75% at 7 dpa, which proved to be ideal insecticides for field application. These field-based results provide guidance for chemical control against thrips and can be valuable in proposing appropriate strategies for thrips resistance management.https://www.mdpi.com/2075-4450/16/5/459cowpeabean flower thripsinsecticide toxicity monitoringresistance managementIPM |
| spellingShingle | Zhengke Peng Mengni Li Chaosong Guo Huixin Zheng Mingyue Wu Fei Yin Yong Xiao Huanhuan Wang Xiangyi Kong Myron P. Zalucki Wen Xie Zhenyu Li Field-Based Evaluation of Insecticide Effectiveness on <i>Megalurothrips usitatus</i> in Guangdong, China: Implications for Pest Control Strategies Insects cowpea bean flower thrips insecticide toxicity monitoring resistance management IPM |
| title | Field-Based Evaluation of Insecticide Effectiveness on <i>Megalurothrips usitatus</i> in Guangdong, China: Implications for Pest Control Strategies |
| title_full | Field-Based Evaluation of Insecticide Effectiveness on <i>Megalurothrips usitatus</i> in Guangdong, China: Implications for Pest Control Strategies |
| title_fullStr | Field-Based Evaluation of Insecticide Effectiveness on <i>Megalurothrips usitatus</i> in Guangdong, China: Implications for Pest Control Strategies |
| title_full_unstemmed | Field-Based Evaluation of Insecticide Effectiveness on <i>Megalurothrips usitatus</i> in Guangdong, China: Implications for Pest Control Strategies |
| title_short | Field-Based Evaluation of Insecticide Effectiveness on <i>Megalurothrips usitatus</i> in Guangdong, China: Implications for Pest Control Strategies |
| title_sort | field based evaluation of insecticide effectiveness on i megalurothrips usitatus i in guangdong china implications for pest control strategies |
| topic | cowpea bean flower thrips insecticide toxicity monitoring resistance management IPM |
| url | https://www.mdpi.com/2075-4450/16/5/459 |
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