摘要
以苘麻Abutilontheophrasti为测试植物,研究了施药后降雨和助剂对咪唑乙烟酸除草活性的影响。结果表明,咪唑乙烟酸有较好的耐雨性,药后2h内无降雨,可保持相当的防效,药后4～8h内无降雨,与无降雨的没有显著差异。添加非离子表面活性剂能明显提高咪唑乙烟酸的除草活性。其中增效作用从大到小依次为:AM-100>PPJ-15>OP-10>SDP,咪唑乙烟酸的IC50值分别比未加助剂处理的下降了33.6%、35.4%、29.5%和17.1%。咪唑乙烟酸的用量越低,助剂的增效作用越明显。
The experiment was conducted to evaluate the influence of rainfall and four nonionic surfactants on the imazethapyr efficacy in velvetleaf,Abutilon theophrasti. The results showed imazethapyr is a herbicide with excellent rainfastness. The differences of phytotoxicity of imazethapyr under simulated rainfall applied 4 h and 8 h after treatment or no any rainfall are not significant. The addition of nonionic surfactants increased imazethapyr efficacy significantly. Among 4 tested surfactants, AM100 increased the phytotoxicity of imazethapyr to the greatest extent, the second is PPJ15, and the last one is SDP. The function of adjuvants to enhance phytotoxicity is more significant with lower dosage of imazethapyr.
出处
《农药学学报》
CAS
CSCD
2003年第3期55-58,共4页
Chinese Journal of Pesticide Science
