除草剂对胡麻田大麦、稷(糜子)的防除效果

Control effects of herbicides on Hordeum vulgare and Panicum miliaceumin linseed field

为筛选胡麻田大麦和稷(糜子)的高效除草剂,进行了7种除草剂防除胡麻田大麦和稷的应用研究。结果表明,108g/L高效氟吡甲禾灵乳油、15%精吡氟禾草灵乳油、240g/L烯草酮乳油和10%精喹禾灵乳油4种除草剂对大麦具有良好防除效果,分别在145.8、270、432g/hm2和90g/hm2剂量(有效成分)下药后45d的株防效达97.39%以上,鲜重防效达99.24%以上,胡麻增产率在91.05%以上,该剂量可作为大面积示范推广的适宜剂量。50g/L唑啉草酯乳油、108g/L高效氟吡甲禾灵乳油、15%精吡氟禾草灵乳油、240g/L烯草酮乳油、15%炔草酸可湿性粉剂、10%精喹禾灵乳油和12.5%烯禾啶乳油7种除草剂对稷具有良好防除效果,分别在75、145.8、270、432、135、90和412.5g/hm2剂量下药后45d的株防效达98.43%以上,鲜重防效达99.40%以上,胡麻增产率在84.41%以上,该剂量可作为大面积示范推广的适宜剂量。上述除草剂在推荐剂量下对胡麻安全。

Field trial was conducted in linseed field to evaluate control effects of seven herbicides on Hordeum vul- gar Linn. and Panicum miliaceum Linn. The results showed that 108 g/L haloxyfop-R-methyl EC, 15% fluazi- fop-P-butyl EC, 240 g/L clethodim EC and 10% quizalofop-P-ethyl EC were effective to control H. vulgare in lin- seed field. The plant and fresh weight control effects were all more than 97.39% 45 days after treatment at the dosages of 145.8, 270, 432 and 90 g/hm2 and the yield of linseed increased more than 91.05%. Their suitable dos- ages in large-scale demonstration and popularization were 145.8, 270, 432 and 90 g/hm2 , respectively. 50 g/L pi- noxaden EC, 308 g/L haloxyfop-R-methyl EC, 15% fluazifop-P-butyl EC, 240 g/L clethodim EC, 15% clodin- afop-propargyl WP, 10% quizalofop-P-ethyl EC and 12.5% sethoxydim EC were effective to control P. miliace- urn in linseed field, the plant and fresh weight control effects were more than 98.43% 45 days after treatment at the dosages of 75, 145.8, 270, 432, 135, 90 and 412.5 g/hm2 and the yield of linseed increased more than 84.41%. Their suitable dosages in large-scale demonstration and popularization were 75, 145.8, 270, 432, 135, 90 and 412.5 g/hm2 , respectively. These herbicides were safe to linseed at the recommended dosages.