南美蟛蜞菊对除莠剂的胁迫反应及其化学防除  

Wedelia trilobata responses to herbicides’ stress and its chemical control

作　　者：吴彦琼[1] 胡劲松[1] 

机构地区：[1]南华大学生命科学与技术学院

出　　处：《生态科学》2006年第4期325-329,共5页Ecological Science

基　　金：南华大学博士及归国人员启动基金科研项目(5-05-XQJ-05003);生物防治国家重点实验室开放基金项目(0202)

摘　　要：南美蟛蜞菊原产中、南美洲，目前成为危害农林生产、破坏生态系统和生物多样性的入侵植物。本文研究了南美蟛蜞菊对化学胁迫的反应和防除措施，结果表明：（1）盆栽的南美蟛蜞菊经不同浓度除莠剂处理后，叶片在短期内出现不同程度的伤害症状，且伤害作用随着浓度的增加而加重。至观察后期。1：200-1：600毒莠定和二氯吡啶酸溶液处理的植物完全枯死：1：200～1：800氟草烟溶液处理的植株完全枯死。（2）不同除莠剂处理后叶绿素含量明显下降。随着处理的处理浓度的提高，对叶绿素的危害程度逐渐加重。（3）不同除莠剂溶液处理后，叶片相对电导率均不例程度升高，且随着处理浓度的升高，相对电导率相应地越高，显示细胞膜受伤害程度越严重。（4）大田药物试验结果显示，三种除莠剂均能在一定的浓度梯度范围内起到防除作用，1：600的毒莠定和二氧吡啶酸溶液、1：800的氟草烟溶液可分别在10～15d时间内完全杀灭南美蟛蜞菊。Wedelia trilobata was a native of Middle and South America. At the present., the invasive plant endangers the agriculture and forestry production, and even destroys the ecosystem and bio-diversity. Researches on its responses to herbicides and measures to control it were initiated. Results showed as follows： （1） Leaves of cultivated W, trilobata treated with different concentrations of herbicides showed various extent injuries and the injury could be intensified as the concentrations increased. W. trilobata treated with 1：200 to 1：600 picloram and clopyralid and 1：200 to 1：800 fluroxypyr solutions were totally killed. （2）W. trilobata showed significant reduction in chlorophyll content after treatment with the herbicides, positive correlation between the concentrations of application and the injury to was observed. （3）After treatment, the cell membrane permeability of the plant was increased, which proved due to damage. （4）Treatment in field showed that three herbicides in combination could kill the plant at 1：600 picloram and clopyralid in 10 days, or 1：800 fluroxypyr in 15 days.

关 键 词：南美蟛蜞菊 除莠剂 防除措施 

分 类 号：Q945.11[生物学—植物学]