Studies on the tolerance to new herbicide pyribambenz-propyl in oilseed rape
Experiments were conducted to investigate the tolerance, its mechanism and the best concentration of PP (Pyribambenz-propyl) and Bispyribac-sodium (BS, Nommnee) in Brassica rapa (including 4 varieties), B. juncea and B. napus determined as the activity of acetolactate synthase (ALS). The results indicated that the ALS activities of PP treatments under higher concentration (500 and 1000 mg/l) were significantly lower than that of the control, while the treatment of PP at low concentration (100 mg/l) showed the higher ALS activity. B. rapa was more sensitive to PP than other two Brassica species (which was 7.7％ lower than that of B. juncea), and B. napus showed the medium tolerance. Within 4 cultivars of B. rapa,Changshaguihuazi and Xiaoyoucai were more sensitive than the other two cultivars. Cultivar Jianghuang showed the highest resistance, with the 6.5％ higher of ALS activity compared to Changshaguihuazi, the most susceptible variety. Further study indicated that the ALS activity increased at 14 days, then began to fall at 28 days (except for 1000 mg/l). Among the all treatments,the 100 mg/l PP played an important role in the promotion of the enzyme effect and improved the growth of plants.
New herbicide Pyribambenz-propyl oilseed rape Brassica species ALS activity tolerance
JIN Zonglai MA Jiayu ZHANG Fan ZHANG Wenfang TANG Qinghong LU Long YE Qingfu ZHOU Weijun
College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310029, China Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
国际会议
第十二届国际油菜大会( The 12th International Rapeseed Congress)
武汉
英文
1563-1566
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）