Different Herbicide on Weed Control Effect of Sweet Potato

[Objective] The aim was to investigate different herbicides with different dosage on weeding effect,provide guidance for real production.[Method] The experiment was conducted in Jinzhu Town and Baishiyan rural of Guiyang City between 6—11 month in 2011,by adopting the randomized block design arrangement,repeat 3 times,9 treatments,1 blank control.The field effect of the absolute value(measuring) survey method,the test data by Duncan's multiple range(DMRT) method statistical analysis on test data.[Result] The herbicidal effect of treatment ⑥(50% acetochlor EC 3 000 mL/hm2 +24% oxyfluorfen EC 300 mL/hm2) was the best in Guiyang of central Guizhou;the herbicidal effect of treatment ③(50% acetochlor EC 3 000 mL/hm2) and treatment ⑨(10% quizalofop-p-ethyl 1 500 mL/hm2) was the best in Ziyun County of Western Guizhou.[Conclusion] The herbicidal effect of treatments with 50% acetochlor EC 3 000 mL/hm2,10% quizalofop-p-ethyl 1 500 mL/hm2 and 50% hectares of acetochlor EC 3 000 mL/hm2 mixed 24% oxyfluorfen EC 300 mL/hm2 were better.