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National Chung Hsing University Institutional Repository - NCHUIR > 農業暨自然資源學院 > 農藝學系 > 依資料類型分類 > 期刊論文 >  2-aminobutyric acid as a chemical marker for the detection of sulfonylurea herbicides

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/134627

標題: 2-aminobutyric acid as a chemical marker for the detection of sulfonylurea herbicides
作者: Li, Y.Z.;Wang, C.Y.
王慶裕
關鍵字: bensulfuron;bioassay;imazosulfuron;pyrazosulfuron;bensulfuron-methyl;chlorsulfuron
日期: 2005
Issue Date: 2012-12-14 11:00:13 (UTC+8)
關連: Weed Technology, Volume 19, Issue 1, Page(s) 176-182.
摘要: The objective of this study was to evaluate the feasibility of using 2-aminobutyric acid (2-aba) as a chemical marker for the detection of sulfonylurea (SU) herbicides in crop and soil environments. A bioassay, on the basis of the injury index to vegetable seedlings, showed that both field mustard and Chinese mustard were more sensitive to bensulfuron, imazosulfuron, and pyrazosulfuron than lettuce and cabbage in winter. In a similar study, field mustard was found to be the most sensitive species among six summer vegetables. After foliar application of bensulfuron at 0.487 mu M, 2-aba accumulation reached the maximum in field mustard within 6 to 12 h, before any visible symptoms appeared, and this high level was maintained up to 72 h. Among all vegetables tested for differential SU sensitivities, maximum accumulation of 2-aba occurred, in coincidence with the onset of injury, in field mustard. The accumulation of 2-aba in field mustard showed a linear regression to the log-transformed concentrations, ranging from 10(-2) to 10(2) mu M, of each of the three SUs. However, no such relationship between the applied rate, especially at the lower rates, and the residue content of SUs in field mustard plant was found. In addition, with the extract of SU-treated paddy soil sprayed on field mustard, the accumulation of 2-aba in this plant was found to reflect indirectly the amount of SU residues in the soil.
Relation: Weed Technology
Appears in Collections:[依資料類型分類] 期刊論文
[依教師分類] 王慶裕

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