Current Status Of Invasive Alienpests In Shaanxi Forestry And Control Strategies

The impacts and invasion method of alien invasive species(AIS) and prevention and management of biological invasion are discussed .Biological invasion is becoming one of the most important factors threatening biodiversity and stability of various ecological systems in shaanxi provinceThe impacts of these biological invasions are becoming a more serious problems with development and increase of global trade, transportation , international travel and ecological tourism. Harmful AIS often leads to irreversible species extinction, and results in substantial economic losses within managed and natural ecosystems, including agriculture, forestry, fishery and animal production .Newly invading weeds ,insect pests and plant diseases frequently result in large-scale outbreaks and persistent use of chemical- pesticides. Successful invasion and spread of some major insect pests and weeds in shaanxi province were caused by man-made factors. These include decision mistakes and unintentional introduction of some plants such as water hyacinth and alligator weed as pig food, irresponsible introduction actions taken by individual/group without any ecological concerns, and lack of rapid response mechanism for eradicating potentially AIS as soon as they appear.The alien pest invasion is one of the most environmental problems in the world. The people have already begun to pay attention to the biological invasion and its impact on bio- diversity. This paper analyzes the current status of the biological inva-sion in shaanxi province, and proposes some strategies in prevention and control of the invasive alien pest.