Cross-resistance of imazethapyr-resistant common sunflower (Helianthus annuus) to selected imidazolinone, sulfonylurea, and triazolopyrimidine herbicides

被引：24

作者：

Baumgartner, JR ^{[1
]}

Al-Khatib, K ^{[1
]}

Currie, RS ^{[1
]}

机构：

[1] Kansas State Univ, Dept Agron, Manhattan, KS 66502 USA

来源：

WEED TECHNOLOGY | 1999年 / 13卷 / 03期

关键词：

chlorimuron; 2-[[[[(4-chloro-6-methoxy-2-pyrimidinyl)amino]carbonyl]amino] sulfonyl]benzoic acid; cloransulamm, 3-chloro-2-[[5-ethoxy-7-fluoro[1,2,4]triazolo[1-5-c]pyrimidin-2yl)sulfonyl]amino]benzoic acid; imazamox, 2-[-4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2yl]-5-(methoxymethyl)-3-pyridinecarboxylic 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 sunflower; Helianthus annuus L-#(3) HELAN; herbicide resistance; acetolactate synthase;

D O I：

10.1017/S0890037X0004608X

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

The study was conducted to determine the cross-resistance of imazethapyr-resistant common sunflower (Helianthus annuus) to selected imidazolinone, sulfonylurea, and triazolopyrimidine herbicides. Whole-plant herbicide dose-response curves and in vitro enzyme studies showed that imazethapyr-resistant common sunflower was highly resistant to imazamox, slightly resistant to thifensulfuron and chlorimuron, and not resistant to cloransulam. Resistance ratios of herbicide concentrations required to inhibit growth by 25% were 310, 3.3, 2.0, and 1.4 times greater in the resistant biotype than in the susceptible biotype for imazamox, thifensulfuron, chlorimuron, and cloransulam, respectively. Similarly, herbicide concentrations required to inhibit ALS activity in vitro by 25% were 332.0, 18.6, 8.3, and 1.2 times greater in the resistant biotype than in the sensitive biotype for imazamox, chlorimuron, thifensulfuron, and cloransulam, respectively.

引用

页码：489 / 493

页数：5

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