Field Resistance of Digitaria sanguinalis (L.) Scop. to Haloxyfop-P-methyl in China's Cotton Fields
文献类型： 外文期刊
作者： Zong, Tao 1 ; Li, Jie 2 ; Zhou, Xuguo 4 ; Liu, Xiangying 1 ;
作者机构： 1.Hunan Agr Univ, Coll Plant Protect, Changsha 410128, Peoples R China
2.Shantou Polytech, Shantou 515071, Peoples R China
3.Hunan Acad Agr Sci, Hunan Prov Key Lab Biol & Control Weeds, Changsha 410125, Peoples R China
4.Univ Kentucky, Dept Entomol, Lexington, KY 40546 USA
关键词： herbicide resistance; Digitaria sanguinalis; haloxyfop-P-methyl; acetyl-CoA carboxylase; glutathione S-transferase
期刊名称：AGRONOMY-BASEL （ 影响因子：3.949； 五年影响因子：4.117 ）
ISSN：
年卷期： 2022 年 12 卷 5 期
页码：
收录情况： SCI
摘要： Large crabgrass, Digitaria sanguinalis (L.) Scop., is a devastating weed species in the cotton (Gossypium spp.) fields in China. It has developed resistance to haloxyfop-P-methyl, an aryloxyphenoxypropionate herbicide known for its ability to inhibit lipid synthesis and induce oxidative stress in weeds, due to years of continuous and intensive use. Here, we present the results from a nation-wide, long-term resistance monitoring effort. To understand the scale and level of haloxyfop-P-methyl resistance, a total of 65 D. sanguinalis populations from eight cotton production provinces, including Hunan, Jiangxi, Xinjiang, Henan, Hubei, Hebei, Shanxi, and Anhui, were collected from 2014-2017. Based on results from dose response to haloxyfop-P-methyl, we observed a gradient of sensitivity to haloxyfop-P-methyl among 65 field populations, ranging from sensitive (8), to low-level resistance (40; 2 <= RI <= 10) to moderate-level resistance (17; 10 < RI < 20). Although no high-level resistance (RI > 20) was found among the 65 populations, populations from Hunan and Hebei exhibited a rapid spread of field-evolved resistance. After challenged with haloxyfop-P-methyl (48.600 g a.i./ha at the 4-5-leaf stage), resistant and susceptible D. sanguinalis responded differently in the activity of an array of resistance-related enzymes, including acetyl-CoA carboxylase (ACCase), glutathione S-transferase (GSTs), nicotinamide-adenine dinucleotide phosphate (NADPH) and carboxylesterase (CarE), suggesting the potential involvement of NADPH, CarE and GSTs in D. sanguinalis to haloxyfop-P-methyl resistance.
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