Baseline sensitivity of Echinochloa crus-galli (L.) P.Beauv. to tripyrasulfone, a new HPPD-inhibiting herbicide, in China

Tripyrasulfone is an 4-hydroxyphenylpyruvate dioxygenase (HPPD)-inhibiting herbicide applied postemergence (POST) to control Echinochloa crus-galli (L.) P.Beauv. and other annual weeds in directly seeded and transplanted paddy fields in China. In this study, the baseline sensitivity to tripyrasulfon...

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Bibliographic Details
Published in:Crop protection 2022-08, Vol.158, p.105993, Article 105993
Main Authors: Wang, Hengzhi, Li, Yi, Wang, Lipeng, Liu, Weitang, Wang, Jinxin
Format: Article
Language:English
Subjects:
Barnyard grass
Dose-response assays
Herbicide resistance
Oryza sativa L
QYR301
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Summary:Tripyrasulfone is an 4-hydroxyphenylpyruvate dioxygenase (HPPD)-inhibiting herbicide applied postemergence (POST) to control Echinochloa crus-galli (L.) P.Beauv. and other annual weeds in directly seeded and transplanted paddy fields in China. In this study, the baseline sensitivity to tripyrasulfone of E. crus-galli in paddy fields in China was established using dose-response assays between June and September 2020. The results showed that the sensitivity to tripyrasulfone varied among 58 populations collected from paddy fields in China. The tripyrasulfone dose causing a 50% growth reduction (GR50) in the 58 field populations ranged from 1.95 to 46.47 g a.i. ha−1, and no populations showed resistance to tripyrasulfone. At the same time, the GR50 values were not normally distributed (P 
ISSN:0261-2194
1873-6904
DOI:10.1016/j.cropro.2022.105993