Baseline sensitivity of Echinochloa glabrescens to florpyrauxifen-benzyl on a regional scale: A case study of Jiangsu Province, China
Systematically monitoring the baseline sensitivity of troublesome weeds to herbicides is a crucial step in the early detection of their market lifespan. Florpyrauxifen-benzyl is one of the most important herbicides used in rice production throughout the world, and has been used for 5 yr in China. Ba...
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Cambridge University Press
2025-01-01
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| Series: | Weed Technology |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S0890037X2500003X/type/journal_article |
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| author | Chen Guo-qi Chen Yang Aatiqa Masoom Wu Jia-jun Wei Hai-yan |
| author_facet | Chen Guo-qi Chen Yang Aatiqa Masoom Wu Jia-jun Wei Hai-yan |
| author_sort | Chen Guo-qi |
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| description | Systematically monitoring the baseline sensitivity of troublesome weeds to herbicides is a crucial step in the early detection of their market lifespan. Florpyrauxifen-benzyl is one of the most important herbicides used in rice production throughout the world, and has been used for 5 yr in China. Barnyardgrass is one of the main targeted weed species of florpyrauxifen-benzyl. In total, 114 barnyardgrass populations were collected from rice fields in Jiangsu Province, China, and using whole-plant bioassays they were screened for susceptibility to florpyrauxifen-benzyl. The GR50 values (representing the dose that causes a 50% reduction in fresh weight of aboveground parts) of florpyrauxifen-benzyl for all populations ranged from 1.0 to 34.5 g ai ha−1, with an average of 6.8 g ai ha−1, a baseline sensitivity dose of 3.3 g ai ha−1, and a baseline sensitivity index of 34.5. Twenty-one days after treatment with florpyrauxifen-benzyl at the labeled dose (36 g ai ha−1), 90% of the barnyardgrass populations exhibited >95% reductions in fresh weight of aboveground parts. Compared with the baseline sensitivity dose, 63, 44, and 7 populations had, respectively, no resistance (55%), low resistance (39%), and moderate resistance (6%) to florpyrauxifen-benzyl. Furthermore, the GR50 distribution of barnyardgrass populations did not show a significant correlation with collection location, planting method (direct-seeding or transplanting), or rice species (Oryza sativa L. ssp. indica or ssp. japonica) at any of rice fields where seeds had been collected (P > 0.05). In conclusion, florpyrauxifen-benzyl remains effective for barnyardgrass control in rice fields despite serious resistance challenges. |
| format | Article |
| id | doaj-art-e585524be7e34075bd18b549fb57f7b1 |
| institution | Kabale University |
| issn | 0890-037X 1550-2740 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Cambridge University Press |
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| series | Weed Technology |
| spelling | doaj-art-e585524be7e34075bd18b549fb57f7b12025-08-20T03:58:40ZengCambridge University PressWeed Technology0890-037X1550-27402025-01-013910.1017/wet.2025.3Baseline sensitivity of Echinochloa glabrescens to florpyrauxifen-benzyl on a regional scale: A case study of Jiangsu Province, ChinaChen Guo-qi0https://orcid.org/0000-0001-5548-8478Chen Yang1Aatiqa Masoom2Wu Jia-jun3Wei Hai-yan4Associate Professor, Jiangsu Key Laboratory of Crop Genetics and Physiology/Jiangsu Key Laboratory of Crop Cultivation and Physiology, Agricultural College (Research Institute of Rice Industrial Engineering Technology) of Yangzhou University, and Jiangsu Co-Innovation Center for Modern Production Technology of Grain Crops, Yangzhou University, Yangzhou, ChinaGraduate student, Agricultural College, Yangzhou University, Yangzhou, China; ChinaGraduate student, Agricultural College, Yangzhou University, Yangzhou, China; ChinaManager, Corteva Agriscience, 201203, Shanghai, ChinaProfessor, Agricultural College of Yangzhou University, Yangzhou, ChinaSystematically monitoring the baseline sensitivity of troublesome weeds to herbicides is a crucial step in the early detection of their market lifespan. Florpyrauxifen-benzyl is one of the most important herbicides used in rice production throughout the world, and has been used for 5 yr in China. Barnyardgrass is one of the main targeted weed species of florpyrauxifen-benzyl. In total, 114 barnyardgrass populations were collected from rice fields in Jiangsu Province, China, and using whole-plant bioassays they were screened for susceptibility to florpyrauxifen-benzyl. The GR50 values (representing the dose that causes a 50% reduction in fresh weight of aboveground parts) of florpyrauxifen-benzyl for all populations ranged from 1.0 to 34.5 g ai ha−1, with an average of 6.8 g ai ha−1, a baseline sensitivity dose of 3.3 g ai ha−1, and a baseline sensitivity index of 34.5. Twenty-one days after treatment with florpyrauxifen-benzyl at the labeled dose (36 g ai ha−1), 90% of the barnyardgrass populations exhibited >95% reductions in fresh weight of aboveground parts. Compared with the baseline sensitivity dose, 63, 44, and 7 populations had, respectively, no resistance (55%), low resistance (39%), and moderate resistance (6%) to florpyrauxifen-benzyl. Furthermore, the GR50 distribution of barnyardgrass populations did not show a significant correlation with collection location, planting method (direct-seeding or transplanting), or rice species (Oryza sativa L. ssp. indica or ssp. japonica) at any of rice fields where seeds had been collected (P > 0.05). In conclusion, florpyrauxifen-benzyl remains effective for barnyardgrass control in rice fields despite serious resistance challenges.https://www.cambridge.org/core/product/identifier/S0890037X2500003X/type/journal_articleBarnyardgrassEchinochloa glabrescens Munro ex Hook. f.florpyrauxifen-benzylriceOryza sativa L.Baseline sensitivityEchinochloa glabrescensflorpyrauxifen-benzylpaddy fieldresistance |
| spellingShingle | Chen Guo-qi Chen Yang Aatiqa Masoom Wu Jia-jun Wei Hai-yan Baseline sensitivity of Echinochloa glabrescens to florpyrauxifen-benzyl on a regional scale: A case study of Jiangsu Province, China Weed Technology Barnyardgrass Echinochloa glabrescens Munro ex Hook. f. florpyrauxifen-benzyl rice Oryza sativa L. Baseline sensitivity Echinochloa glabrescens florpyrauxifen-benzyl paddy field resistance |
| title | Baseline sensitivity of Echinochloa glabrescens to florpyrauxifen-benzyl on a regional scale: A case study of Jiangsu Province, China |
| title_full | Baseline sensitivity of Echinochloa glabrescens to florpyrauxifen-benzyl on a regional scale: A case study of Jiangsu Province, China |
| title_fullStr | Baseline sensitivity of Echinochloa glabrescens to florpyrauxifen-benzyl on a regional scale: A case study of Jiangsu Province, China |
| title_full_unstemmed | Baseline sensitivity of Echinochloa glabrescens to florpyrauxifen-benzyl on a regional scale: A case study of Jiangsu Province, China |
| title_short | Baseline sensitivity of Echinochloa glabrescens to florpyrauxifen-benzyl on a regional scale: A case study of Jiangsu Province, China |
| title_sort | baseline sensitivity of echinochloa glabrescens to florpyrauxifen benzyl on a regional scale a case study of jiangsu province china |
| topic | Barnyardgrass Echinochloa glabrescens Munro ex Hook. f. florpyrauxifen-benzyl rice Oryza sativa L. Baseline sensitivity Echinochloa glabrescens florpyrauxifen-benzyl paddy field resistance |
| url | https://www.cambridge.org/core/product/identifier/S0890037X2500003X/type/journal_article |
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