In recent years, China has imported more than 70 million cubic meters of timber annually, accounting for more than 40% of China's annual timber consumption, accounting for more than 10% of the global total. Ports such as Jiangsu, Zhejiang, Shandong, Guangdong and Shanghai are the main entry ports for timber, and these entry ports and timber flows are highly coincident with the economic corridors of China. Their economic and trade significance is becoming more and more prominent, and the importance of risk prevention and control is self-evident.

Epidemic risk analysis of imported timber

Taking Jiangsu port of Taicang, the largest port of China's entry timber as an example, in 2015, 2016 and the first half of 2017, Taicang port has imported 8 million 452 thousand cubic meters, 8 million 876 thousand and 900 cubic meters and 5 million 597 thousand and 800 cubic meters of timber respectively. Taicang Bureau in 2015, 2016 and the first half of 2017 were intercepted 14322 kinds of pests, 10619 times and 4321 times, and the new port intercepted pests often appear only in the first half of 2017, Taicang Bureau intercepted scatter beetle and other national spine first intercepted pests and 11 kinds of.

Obviously, from China's timber import pattern and invasive pest risk degree in a real sense, the main area of Jiangsu, Zhejiang, Shandong imported from Shanghai and Guangdong, "The Belt and Road" domestic corridor involved undoubtedly assume a key flu risk control pressure.

Current situation and defects of epidemic prevention and control system of imported timber in China

Our country set up multiple risk defense in the imported timber quarantine work, one must go through quarantine treatment of wood before entry, otherwise not allowed entry; two is the surface, middle berth quarantine quarantine, quarantine is lower; three the goods transported to the yard and quarantine yard after the implementation of the epidemic and quarantine treatment of wood found yard quarantine; four is to monitor the implementation of important forest pests in imported wood wharf. It can be said that through these 4 tight risk lines, the epidemic risk of imported wood is reduced to a very low level, which provides an effective guarantee for the biological safety of wood imports.

However, although the risk prevention and control system of imported wood epidemic in China has been more perfect and effective, there are still potential risks of potential risks. To some extent, this risk may lead to the outbreak of wood outbreaks barrier, and colonization and diffusion in the hinterland of china.

The quarantine qualified timber still has potential risk. The risk of quarantine qualified timber can not be controlled by 100%. The main reason is that the quarantine treatment can not achieve 100% of the effect of killing harmful organisms; quarantine inspection can not guarantee 100% of the possible existence of living pests; even if the risk of the outbreak is found, 100% can not find the corresponding treatment measures. Methyl bromide fumigation can basically kill all pests in the wood species. However, due to the effects of specific operations, pharmaceutical quality, regulatory system, seasonal climate change and other factors, the possibility of completely killing all pests in the actual process is objective. It can be said that the potential risk of both peeled logs and tree diseases is higher than quarantine risk.

The potential risks of imported timber domestic trade can not be ignored. The flow direction of imported wood in domestic trade is less controllable. In the process of quarantine and supervision of imported timber, there is no special set of follow-up supervision link. Once the imported timber has been completed quarantine and release at the port, it can be transported to any region of the country theoretically. In fact, many of the timber that has passed the inspection and quarantine at the port can be transported directly to the areas rich in forest resources for trade processing. In this case, the "natural barrier of forest pest monitoring" this line of defense as well as the initial entry ports misfired, imported logs after passing through quarantine in reaching important forest areas in China where, once carried a few live alien pest, there is a higher likelihood of colonization and spread of epidemic.

Supervision measures and Implementation Suggestions of imported timber

Based on the previous analysis of imported wood, four suggestions are put forward for the supervision of imported timber:

Strengthening supervision function. The inspection and quarantine departments to strengthen supervision of imported timber traders, clear wood import traders in the quarantine security responsibility, the implementation of record declaration system, require traders to accurately declare the flow and use of wood, is the port inspection and quarantine departments to accurately grasp the flow of imported timber and use information, and inform the inspection and quarantine institutions and wood into Forestry Department of risk prevention and control. We should strengthen the forestry sector, and market circulation department, transportation department and other departments of the joint supervision, data sharing, focus on strengthening the supervision concerning transportation enterprises and processing enterprises in the link of wood after the entry of derivatives, risk prevention and control of transportation to the subsequent production and other aspects.

Strengthening quarantine control at ports. We should strengthen the risk prevention and control of imported peeled logs, especially the North American peeled logs, to focus on the prevention and control of epidemic lines. On the one hand, close attention should be paid to the skin condition of peeled logs before and after ship unloading, especially if there is a small amount of single skin. On the other hand, we further confirm the risks through the quarantine process. That is to evaluate the overall epidemic risk of the peeled logs by means of the quantity of intercepted insects and live / dead status of the insects, so as to provide reference for the implementation of quarantine treatment and subsequent prevention and control. We should also strengthen the understanding of the introduction risk of forest diseases and the importance of forest disease quarantine. It is suggested that the quarantine of forest diseases must be carried out at the main timber entry ports, and the relevant assessment will be carried out so that the quarantine and prevention of forest diseases can be truly carried out