Effects Of Different Herbicides On Growth And Weed Prevention In Sugar Beet

Sugar beet is one of the main sugar crops in China,and also an important economic crop in Inner Mongolia.In recent years,with the large-scale planting of sugar beets in Inner Mongolia,the problem of weed control has become increasingly prominent.At present,the application of herbicide is the main technical means of weed control.However,because of the lack of the specific and efficient herbicide and its unified application standard in sugar beet,the misuse,abuse and even excessive application are common in sugar beet production.Not only the effect of weed control is poor,but also the events of seedling drug damage and soil residue occur frequently.In this research,the evaluation of safe application and screening of optimum mixed combinations for different types of herbicides in sugar beet was done,so as to provide reference for the safe application of herbicides in sugar beet production,and the research results could have instructional significance for efficient weed control in sugar beet production.The main research results are as following:(1)In 2-leaf stage,4-leaf stage and 6-leaf stage of sugar beet,the highest safe dosage of desmedipham&phenmedipham in sugar beet fields were respectively:100 ml/667 m~2,120 ml/667 m~2and 350 ml/667 m~2;(2)In 2-leaf stage,4-leaf stage and 6-leaf stage of sugar beet,the highest safe dosage of ethoprophos in sugar beet fields were respectively:40 ml/667 m~2,60 ml/667 m~2and180 ml/667 m~2;(3)In 2-leaf stage,4-leaf stage and 6-leaf stage of sugar beet,the highest safe dosage of triflusulfuron-methyl in sugar beet fields were respectively:2g/667 m~2,4g/667 m~2and6.5g/667 m~2;(4)The combination of 16%desmedipham&phenmedipham 300ml/667m~2,20%ethoprophos 120ml/667m~2and 12%enodone 120ml/667m~2was the best chemical measure control for Chenopodiaceae,Amaranthaceae and Gramineous weeds in sugar beet fields.