Historical Stages and Characteristics of Invasion of Alien Species Mikania micrantha in Guangdong Province

Guangdong Province is the first area invaded by Mikania micrantha and the most seriously endangered area in China. Mikania micrantha is distributed widely with a large invasion range. So far,Mikania micrantha covers almost all regions in Guangdong Province,causing great harm to the economy,society and ecological environment. Currently,artificial control,chemical control and biological control are three major means for the prevention and control of Mikania micrantha. Chemical control is a commonly used method to prevent and control Mikania micrantha. Sulfometuron methyl,glyphosate,2,4-D and Mieweijing are the major chemical agents. In biological control,Liothrips mikaniae Priesn.,Actinote thalia pyrrha,Actinote anteas,Cryptothelea minuscala Butler,Brevipalpus phoenicis and Cuscuta chinensis are major predators of Mikania micrantha. At present,little information is available on the utilization of Mikania micrantha in China,which requires further investigation.