Analysis Of Intercepted Pests In Plant Products Imported From Lianyungang Port And Risk Analysis Of Important Pests

This thesis summarizes the quarantine traits of the imported soybeans,dried cassavas and timber,through whose quarantine situations were analyzed from 2012 to 2016 in Lianyungang port.According to the literatures and data,one of the quarantine pests was chosen respectively in the soybeans,dried cassavas and timber to conclude the potential habitat areas by DIVA-GIS analyses.Through the quarantine situation analysis of the imported soybeans from 2012 to 2016,it is known that:1.The amount of the pests found in the imported soybeans is growing with the quantity of the imported soybeans increase every year.2.In terms of the source of imported soybeans,the United States,Brazil and Argentina are the main sources,Uruguay and Canada have relatively small quantities.Among them,Brazilian soybeans intercepted the most harmful varieties,the United States soybean intercepted the most harmful species,the United States soybean intercepted the highest varieties and species of quarantine harmful organisms.3.Weeds are the main pests in the imported soybeans.Plant pathogenic fungus and insects take the secondary position.Plant virus,nematodes and bacterium are found seldomly.4.The frequencies of the most pests are fewer than 100.The capture of the pests is incidental and focused on the species of the quarantine pests.5.Quarantine weeds are most likely found by the port inspection and quarantine personnel.Plant pathogenic fungus,virus and insects are found sometimes.The inspection ability of the plant pathogenic fungus and virus should be enhanced.Through the quarantine situation analysis of the imported dried cassavas from 2012 to 2016,it is known that:1.The frequencies of the pests found in the imported dried cassavas are growing with the amount of the imported dried cassavas increases collectively.2.In terms of the source of dried cassava imports,Thailand and Vietnam are the main sources,Cambodia,Indonesia,Nigeria and Ghana have low imports less.Among them,the largest number of varieties and species of harmful organisms was intercepted in the dried cassava of Vietnam,the most varieties of quarantine harmful organisms were intercepted in the dried cassava of Vietnam,and the highest species of quarantine harmful organisms were intercepted in the dried potato of Thailand.3.Insects are the main pests in the imported dried cassavas.Plant pathogenic fungus and weeds take the secondary position.Plant virus,nematodes and bacterium have not been found.4.The frequencies of the most pests are fewer than 100.The capture of the pests is incidental and focused on the species of the quarantine pests.5.Quarantine insects are most likely found by the port inspection and quarantine work.Weeds are found seldomly.The inspection ability of the plant pathogenic fungus and virus should be strengthened.Through the quarantine situation analysis of the imported timber from 2012 to 2016,it is known that:1.The quantity of the imported timber first increased and then decreased.The amount of the pests found in the imported timber grows collectively.2.In terms of the source of timber,North America,Oceania and Southeast Asia are the main sources.Other places take a little proportion.Meanwhile,Southeast Asian wood has the highest varieties and species of pests,North American wood has the highest varieties of quarantine pests,and Southeast Asian wood has the highest species of quarantine pests.3.Insects are the main pests in the imported timber.Other pests are found rarely.4.The frequencies of the most pests are fewer than 100.The capture of the pests is incidental and focused on the species of the quarantine pests.5 Quarantine insects are most likely found by the port inspection and quarantine personnel.Plant pathogenic fungus,nematodes and mollusks are found sometimes.The inspection ability of the plant pathogenic fungus,nematodes and mollusks should be enhanced.By the pest risk analysis of Amaranths palmeri,Solenopsis invicta and Hylurgus ligniperda,we know that there are large highly suitable areas for Amaranths palmeri and Solenopsis invicta in China,and there are not highly suitable areas for Hylurgus ligniperda in China.