Palmer amaranth (Amaranthus palmeri) and common waterhemp (Amaranthus rudis) resistance to selected ALS-inhibiting herbicides

被引：71

作者：

Sprague, CL

Stoller, EW

Wax, LM

Horak, MJ

机构：

[1] UNIV ILLINOIS,DEPT CROP SCI,URBANA,IL 61801

[2] KANSAS STATE UNIV,DEPT AGRON,MANHATTAN,KS 66506

来源：

WEED SCIENCE | 1997年 / 45卷 / 02期

关键词：

chlorimuron; 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]benzoic acid; imazethapyr, 2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acid; thifensulfuron, 3-[[[[(4-methoxy-6-methyl-1,3,5-triazin-2-yl)amino]carbonyl]amino]sulfonyl]-2-thiophenecarboxylic acid; common waterhemp; Amaranthus radis Sauer AMATA; Palmer amaranth; Amaranthus palmeri S Wats AMAPA; herbicide resistance; cross-resistance; acetolactate synthase; AMATA; AMAPA;

D O I：

10.1017/S0043174500092705

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Imazethapyr-resistant biotypes of Palmer amaranth and common waterhemp were studied to determine the magnitude of resistance and cross-resistance to three acetolactate synthase (ALS)-inhibiting herbicides. Resistant biotypes of Palmer amaranth and common waterhemp demonstrated > 2,800- and > 130-fold resistance to phytotoxicity of imazethapyr compared to susceptible biotypes, respectively. Concentrations of imazethapyr required for 50% in vivo inhibition of ALS activity were at: least > 13,100 and > 1,900 times greater for resistant biotypes of Palmer amaranth and common waterhemp, respectively, compared to susceptible plants. Resistant biotypes of both species demonstrated cross-resistance to the sulfonylurea herbicides thifensulfuron and chlorimuron at the whole plane and enzyme levels, indicating that a less sensitive ALS enzyme confers this resistance to these plants.

引用

页码：192 / 197

页数：6

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