沈阳地区草坪禾本科杂草化学防除技术研究

Chemical control of gramineous turf weeds in the Shenyang area

禾本科杂草是草坪中的顽固性杂草,其危害严重,防除困难。为了筛选安全有效的化学除草剂,于2001年在沈阳进行了相关研究。通过除草剂安全性评价和药效试验,筛选出对草坪草安全而能有效控制4种杂草的化学除草剂及其最佳剂量:萌前除草剂为48%氟乐灵EC(1500ml hm2);苗期除草剂骠马水乳剂为6 9%(750ml hm2),50%快杀稗WP(750g hm2),综合鲜重杀草率分别可达81%,88%,79%;应用于草坪更新除杂的灭生性除草剂为20%克芜踪水剂(600～900g hm2),其株数杀草率可达100%。其中,骠马对马唐,快杀稗对稗草有很高的防效,分别为92%和93%。

Gramineous turf weeds are obstinate, cause severe harm, and are difficult to control In order to find safe and effective chemical herbicides, experiments were carried out in Shenyang, 2001, applying herbicides to four kinds of gramineous turf weeds: crabgrass, barnyard grass, yellow foxtail grass, and goosegrass Herbicides and their best application rates were chosen to effectively control these four kinds of gramineous weeds, but be safe to turfgrass These herbicides included a pre emergence herbicide composed of 48% Trifluralin EC applied at 1 500 ml/hm 2, and post emergence herbicides including one composed of 6 9% Puma water EC applied at 750 ml/hm 2, and one composed of 50% Quinclorac WP applied at 750g/hm 2 Based on fresh weight, their weed kills were 81%, 88%, and 79%, respectively The use of a non selective herbicide (20% Quaraquat gramoxoneat applied at 600～900 g/hm 2) resulted in a 100% plant kill rate The effects of Puma on crabgrass, and Quinclorac on barnyard grass were very satisfactory, with control rates of 92% and 93% respectively