马蹄金草坪苗后阔叶杂草防除技术研究

STUDY ON CONTROL TECHNIQUE OF POSTEMERGENCE BROADLEAF WEEDS ON Dichondra repens TURF

调查显示 ,马蹄金草坪中常见的阔叶杂草有空心莲子草、酢浆草、天胡荽、斑地锦、半边莲、石胡荽、小飞蓬、一年蓬等 10余种。阔叶马蹄金草坪中防除已出苗的阔叶杂草 ,要求除草剂必须具有高度的选择性。试验结果表明 ,绿茵SL 2号 5 2 5～ 6 75g/hm2 能有效地防除 2～ 5叶期阔叶杂草以及香附子、水蜈蚣、马唐、稗草、牛筋草等其它杂草 ,一次使用具有茎叶处理和土壤封闭双重作用 ,持效期长达 80～ 90d ;绿茵L 8号 195 g/hm2 和甲磺隆 4 5 g/hm2 对阔叶杂草防效优异 ,与防除禾本科杂草的除草剂混用 ,可扩大杀草谱。

The investigation results showed that there were over 10 common broadleaf weed species on Dichondra repens turf, such as A lternanthera philoxeroides, Oxalis corniculata, Hydrocatyle sibthorpiodes, E uphorbia supina, Lobelia chinensi, Centipeda minima, Sagina japonica, Conyza can adensis, Erigeron annuus, Cerastium caespitosum and Veronica persica. Herb icides for controlling postemergence broadleaf weeds on Dichondra repens t urf are required having high selectivity. The experimental results showed that Luyin SL 2 at 525～675 g/hm 2 was not only effective to 2～5 leaf broadleaf w eeds , sedge and grass weeds, but also can keep weed free for 80～90 days after application. Luyin L 8 at 195 g/hm 2 and Methsulfuron methyl at 45g/hm 2 are also used to control effectively broadleaf weeds on Dichondra repens turf.