噻吩磺隆对苘麻的活性测定及对大豆的选择性试验

Test of Activity of Thifensulfuron-methyl on Abutilon theophrasti Medic and Selective Test on Soybean

摘要:

[目的] 测定噻吩磺隆对苘麻的活性及在大豆与苘麻间的选择性。[方法] 采用除草剂室内生测试验准则—土壤喷雾法。[结果] 噻吩磺隆对苘麻的ED₉₀为82.898 4 g a.i./hm²,是大豆田推荐剂量的3.68倍,在大豆和苘麻之间的选择性指数约为0.40,小于2.00。[结论] 噻吩磺隆对苘麻活性较低,大豆田苘麻较多的田地,若施用噻吩磺隆除草剂,建议与其他适合的除草剂联合施用,以确保对苘麻的防治效果。

Abstract:

The activity of thifensulfuron-methyl on Abutilon theophrasti Medic and its selectivity between Abutilon theophrasti Medic and soybean were tested. Herbicides guideline for laboratory bioassay test—soil spray application was used. Results showed that the ED90 of thifensulfuron-methyl on Abutilon theophrasti Medic was 82.8984 g a.i./hm², which was 3.68 times higher than the recommended dose in soybean field. Moreover, the selectivity index was 0.40 between Abutilon theophrasti Medic and soybean, which was less than 2.00. The activity of thifensulfuron-methyl on Abutilon theophrasti Medic was low. Therefore, when thifensulfuron-methyl was used to control Abutilon theophrasti Medic in soybean field, we suggested other suitable herbicides would be applied to control Abutilon theophrasti Medic.