5种除草剂对吉林省春小麦田杂草防除效果研究

Study on Control Efficiencies of Five Herbicides to Weeds in Jilin Spring Wheat Field

为了考察5种除草剂对吉林省春小麦田杂草的防除效果,并评价其对小麦的安全性,采用茎叶喷雾、定期调查的方法进行田间药效试验。结果表明,春小麦4～6叶期,茎叶喷施40%唑草酮水分散粒剂24.0 g/hm2(有效成分用量,下同)、10%苯磺隆可湿性粉剂13.5 g/hm2、200 g/L氯氟吡氧乙酸乳油180.0 g/hm2,施药后30 d对阔叶杂草的综合防效分别为83.1%、84.7%、90.6%;茎叶喷施69 g/L精唑禾草灵水乳剂67.5 g/hm2、15%炔草酯可湿性粉剂45.0 g/hm2,施药后30 d对禾本科杂草的综合防效分别为90.7%、86.8%。5种药剂对春小麦生长较安全,与人工铲除杂草相比,增产0.31%～1.56%。

In order to investigate the control efficiencies of 5 herbicides to weeds and the safety to wheat in Jilin spring wheat field,this test was done by stem-leaf spraying at 4 to 6-leaf stage and regular investigation.The results showed that the control efficiencies of carfentrazone-ethyl 40% WG at 24.0 g/hm2,tribenuron-methyl 10% WP at 13.5 g/hm2 and fluroxypyr 200 g/L EC at 180.0 g/hm2 to broadleaf weeds on the 30th day after spraying were 83.1%,84.7%,90.6%,respectively.The control efficiencies of fenoxaprop-P-ethyl 69 g/L EW at 67.5 g/hm2 and clodinafop-propargyl 15% WP at 45.0 g/hm2 to grass weeds on the 30th day after spraying were 90.7% and 86.8%,respectively.These 5 herbicides were safe to wheat growth.The increase rates of wheat output were 0.31%-1.56% compared with manual weeding.