应用霸焚、霸寅防除大豆田阔叶杂草研究初报

Initial Study of Controlling Weeds by Bafen or Bayin in Soybean Fields

４４ ％ 霸焚水剂（苯达松和杂草焚） 、４４ ．７ ％ 霸寅水剂（ 苯达松和氟磺胺草醚） 是防除大豆田阔叶杂草除草剂。试验结果表明，４４ ％ 霸焚、４４．７ ％ 霸寅水剂对大豆田阔叶杂草有良好防效，适宜施药时期为大豆１ ～２ 片复叶期，阔叶杂草株高５ｃｍ 左右。适宜用药量为４４ ％ 霸焚水剂２００ ～２５０ｍｌ／６６７ｍ２ 、４４－７ ％ 霸寅水剂２５０ｍｌ／６６７ｍ２ ，除草效果达８５％ 以上。施药初期大豆虽有接触性药害症状，但可恢复并不影响最终产量。

Field trails controlling the broadleaf weeds in the soybean field with 44.7%Bayin(bentazone+acifluorfen) or 44%Bafen(bentazone+fomesafen) were carried out in 1998.The results showed that 44%Bafen or 44.7%Bayin gave good control to broadleaf weeds.Optimum application timing was at the 1st-2nd trifoliate-leaf stage of soybean,and optimum rate of 44%Bafen was 3000～3750ml/ha and 44.7%Bayin was 3750ml/ha.Injury could occur after application,but plant could recover and not affect the yield of soybean.