广西木薯地杂草调查及防除对策

以广西南宁、梧州、贺州、钦州、百色等5个木薯主产区为对象,对广西不同地区木薯地杂草种类及其为害状况进行调查。结果表明,广西木薯地杂草有13科33种,其中优势杂草为阔叶丰花草（Spermacoce latifolia）、马唐（Digitaria sanguinalis）、香附子（Cyperu srotundus）和胜红蓟（Ageratum conyzoides）,相对多度分别为55.11%、35.0%、32.32%和29.53%;其次是白茅（Imperate cylindrica）、鸭跖草（Commelina communis）、碎米莎草（Cyperus iria）、旱稗（Echinochloa crusgalli）和赛葵（Malvastrum coromandelianum）,相对多度分别为17.65%、15.02%、12.13%、10.87%和10.57%,为木薯地常见杂草。生产上宜采取农业防治、物理机械防治及化学防治等多种技术措施控制木薯地草害的发生与为害。

Investigations on control strategies of weeds problems in cassava (Manihot esculenta Crantz)fields in Guangxi

The present experiment has been conducted to study the kinds of weeds and the damages caused by them in five main cassava producing areas of Guangxi,viz.,Nanning,Wuzhou,Hezhou,Qinzhou and Baise.The results showed the presence of 33 kinds of weeds,belonging to 13 families,in Guangxi cassava fields,out of which,the dominant weeds were Spermacoce latifolia,Digitaria sanguinalis,Cyperu srotundus,Ageratum conyzoides and Imperate cylindrical,with 55.11,35.00,32.32 and 29.53% relative abundance,respectively.The common weeds included Imperate cylindrical,Commelina communis,Cyperus iria,Echinochloa crusgalli and Malvastrum coromandelianum,with 17.65,15.02,12.13,10.87 and 10.57% relative abundance,respectively.Different weed control measures,such as physical and mechanical,chemical techniques have been proposed to control the occurrence and damages caused by weeds,effectively.