Parthenium hysterophorus L. (Asteraceae)

摘要: Parthenium is a serious problem in several tropical and sub-tropical areas around the world particularly an emerging southern Africa. It Weed of National Significance Australia. The chapter summarises current knowledge about taxonomy, biology, distribution, ecology, impacts biological control weed worldwide. Queensland has led attempts to achieve parthenium since it first began foreign exploration 1977. Since then nine insects two rusts have been released Queensland. Some these been, or will be, used by other countries. program brought significant benefits through increase grass biomass some areas. Instances non-target attack one agent, India, are discussed with conclusion that effects were ultimately negligible possibly due pollen lodging on leaves plants. introduced for also given measure very closely related weeds, ragweed Noogoora burr. paper draws local climatic conditions important when considering whether successful agent country be useful second country.