两种喷雾助剂对氟磺胺草醚在反枝苋上的 吸收和药效的影响

采用14C-氟磺胺草醚同位素标记法研究了喷雾助剂JFC 和ABS(十二烷基苯磺酸钠)对14C-氟磺胺草醚在反枝苋上的吸收和药效的影响。结果表明,在药液中添加2 g/L的JFC ,反枝苋对14C-氟磺胺草醚的吸收面积可增加1.4倍,吸收量增加3.2倍,药效提高28.5%;添加2 g/L的ABS ,反枝苋对14C-氟磺胺草醚的吸收面积增加1.3倍,吸收量增加1.0倍,药效提高19.2%。JFC不但具有促进药液在反枝苋叶面扩展的能力,还具有促进药剂渗透的能力,当添加2 g/L的JFC 时,反枝苋单位面积吸收强度增加75.7%;ABS基本上不能增加反枝苋单位面积的吸收强度,只具有促进药液扩展的能力。

Influence of Two Spray Adjuvants on Uptake and Efficacy of Fomesafen on Red-root, Amaranthus retroflexus

Radiolabeled fomesafen was used to investigate the effects of spray adjuvants ABSsodium dodecyl benzene sulfonate and JFCpenetrating agent JFC on the foliar uptake and fomesafen efficacy on Amaranthus retroflexus.Results indicated that compare to fomesafen applied alone the addition of JFC at 2 g/L increased 1.4-fold areas of uptake,3.2-fold amount of uptake and 28.5% efficacy offomesafen;the addition of ABS at 2 g/L increased 1.3-fold areas of uptake,a fold amount of uptake and 19.2% efficacy of fomesafen for A.retroflexus.Not only could JFC increase the areas of uptake,but also it enhanced the activity per unit area.The activity was enhanced to 75.7% by JFC at 2 g/L on A.retroflexus.Basically,ABS could only increase the areas of uptake,but did not enhance the activity.