The interaction of 2-(2-benzothiazolyloxy)-N-methyl-N-phynyl-acet -amide(BTMPA) with maize DNA and setaria DNA was studied by UV spectrophotometry, and a vovel grass-removal mechamism was recommend -ed.

• 用紫外分光光度法研究了玉米和狗尾草等旱地植物DNA与除草剂的作用。