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The acceleration of the process of global economic integration, the increasingly common phenomenon of biological invasions, which will lead to increasingly serious economic impact to the national economy, biodiversity, ecological environment and the national economy are brought tremendous the risk and the threat of invasive species, through the means of inspection and quarantine exclusion from outside the country is the most important preventive measures. Scolytidae insect Boring Beetle is the most important forest, hidden harms, is the most common type of insects spread through international trade. China timber importer, various Boring Beetle with timber entering the country has a great possibility. This article statistics the Scolytidae types of the Kunshan ports 2004-2009 intercepted a total of 34 kinds of the wood bark beetles are Xyleborus have 17 species, accounting for 50%. Intercepted material piniperda total of 87 batches, of wood bark beetles from Southeast Asia batch of 63, accounting for 72%. The the visible the Kunshan ports intercepted bark beetle wood bark beetles main, the main source for the Southeast Asian region. Intercepted material bark beetle species including the deficit-wood bark beetle X. ferrugineus, the the wide surface material piniperda X. validus pellets of wood bark beetles X. saxeseni Ratzeburg, single carved wood bark beetle X.monographus fine point wood bark beetle X. pelliculosus , the the grain wood bark beetle X. perforans accompanied by wood bark beetle X. affinis, pointed tail wood bark beetle X. andrewesi concave edge material piniperda X. emarginatus, the tea timber bark beetle X.fornicatus, smooth wood bark beetles X. the germanus, the dark winged wood bark beetle X. semiopacus, four wood bark beetle X. similis, hairs wood bark beetles and X. ganshoensis 17. Piniperda grain material, dark-winged wood bark beetles, bark beetles of arabica material, four wood bark beetles, accompanied by the wood bark beetles, smooth wood bark beetles main types. Intercepted 10 timber types of bark beetle morphological observation, different material types of bark beetles Coleoptera slant very different, the main differences in the slope, with the differences in the ditch between the ditch, the number of tumor suddenly, the size and location of the and simple retrieval table prepared accordingly. In addition, the paper also observed by scanning electron microscopy grain wood bark beetles the female adult Ultrastructural characteristics compared Kunshan Port intercepted the 10 kinds of wood bark beetle ultrastructure, found that in addition to the conventional optical microscope Coleoptera differences ultrastructure, antennae, setae on the elytra and engraved points, the Pronotum leading edge micro hair, before the outer edge of the hind tibia teeth have great differences. Exotic bark beetle invasion China has a precedent, as found for the first time in China's Shanxi in 1998, followed by the rapid spread of Dendroctonus valens LeConte With the invasion of imported timber and wood packaging our example is a typical spread valens. Biology and distribution of data analyzed, accompanied by wood bark beetle and the red wood bark beetle is a world wide distribution, the more serious harm wood bark beetles, China has not yet occurred reported. Distribution similar location in southern China Latitude, similar to the geographical environment and higher, and its host very extensive Once imported, is likely to cause serious damage, should focus on.
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