黑麦草草坪中杂草的化学防治

Chemical Control of Weeds on Ryegrass Lawn

采用禾耐斯和金都尔2种土壤封闭处理剂先对坪床进行处理,播种出苗后,再采用2甲4氯钠、使它隆和乙羧氟草醚3种除草剂进行苗后杂草防除。结果表明:2种土壤封闭处理剂在施用后的28 d内,防效相近,但在施药60 d后金都尔的防效比禾耐斯的高13.54个百分点。两者对草坪幼苗均无药害。苗后施用3种除草剂对杂草进行防除,结果表明药效最好的是金都尔与2甲4氯钠的组合,在施药后15和30 d防效分别达到88.68%和93.19%。

In this experiment, Acetochlor and S - metolachlor were used to dispose the turf bed first, and then MCPA - Na, Starane and Fluoroglycofen - ethyl were used to control the weeds after sowing. The results indicated that the control effect of Acetochlor and S - metolachlor was almost the same within 2 8 days after treatment , while in 6 0 days , the control effect of S - metolachlor was 13.54 percent higher than that of Acetochlor, and they had no phytotoxicity to the seedlings on the lawn. For the control of the weeds after sowing, the combination of S - metolachlor and MCPA - Na had the best effect, being 88.68% and 93.19% on the 15th and 30th day after treatment respectively.