马蹄金草坪杂草发生特点及防除方法研究

摘要

The occurrence characteristics and control methods of weeds in newly established Dichondra repens turf were studied.The result showed that（1） there were 19 species of weeds in newly established Dichondra repens turf in autumn and winter in Kunming.In which,Fagopyrum dibotrys,Capsella bursapastoris,Galinsoga parviflora,Bidens pilosa,Digitaria sanguinalis,Setaria viridis and Perilla frutescens were the most common weeds;（2） Artificial weeding and spraying Matijing at 195 to 240 g/ha plus Dashahe at 750 to 825 mL/ha were the more suitable control methods in terms of weeding efficiency and environmental safe.If the application amount of herbicide increased,Dichondra repens would be inhibited and even death.The control technique of weeds in Dichondra repens turf needs further research work,and the pesticides should be carefully selected.%研究了马蹄金草坪杂草的发生特点及采用人工除草和复配喷施马蹄净和大杀禾,防除杂草的方法,结果表明：（1）昆明地区新建马蹄金草坪秋冬季节杂草种类共有19种,其中,发生普遍且危害严重的杂草有金荞麦、荠菜、牛膝菊、鬼针草、马唐、狗尾草和紫苏,以荠菜和金乔麦发生密度和频度最高;（2）不同除草措施的除草效果及安全性分析,人工除草,复配喷施马蹄净195g/hm2和大杀禾750mL/hm2,马蹄净240g/hm2＋大杀禾825mL/hm2是较适宜马蹄金草坪杂草的防除方法,若用药量增加为复配喷施马蹄净300g/hm2＋大杀禾900mL/hm2,会使马蹄金草坪出现矮化、黄化,甚至死亡等药害症状。若采用化学除草剂进行马蹄金草坪杂草防除,应本着＂先试验,后推广＂的原则用药,以保证用药安全。