Risk Assessment And Early Warning Research On Bursaphelenchus Xylophilus And Hyphantria Cunea In Mt.Tai

Mount Tai is the World Natural and Cultural Heritage, the World Geopark, the NationalCivilized Scenic Area and the5A Scenic Spot, so it is praised as the "Chinese CapitalMountain". Its natural and ecological landscape are distinctive, the political, social andecological values are inestimable.This study selected the Bursaphelenchus xylophilus and Hyphantria cunea(Drury) whichwere mostly threatened forestry of Mount Tai as the subject, and based on the presentsituation of serious pests for Mount Tai and the research of the early warning technology onserious forestry pests of China. This research was taken the whole forestry system of MountTai as the research scale, did the systematic investigation on various items, for example, thedistribution, pests density and dynamics of Monochamus alternatus on Mount Tai; dangerousmobility status of people in and around Mount Tai scenic spot; susceptibility to B. xylophilusand distribution of Chinese pine. The research indicated that B. xylophilus could not invadeMount Tai scenic spot physically but by artificial factor.Chinese pine was susceptible to B. xylophilus. From the aspects of temperature, parasiticand media insect etc., we analyze that the lower altitudes below400meters on Mount Taiscenic spot was suitable for B. xylophilus, the possibility of invading and colonization arehigher, risk value is high grade too. In the area of elevation of400to700meters, the climaticconditions are not suitable for B. xylophilus by the increasingly height, but the risk also exists.However in the area above the height of800meters, B. xylophilus could not alive because ofthe lower temperature, the risk is zero. The lower elevation area include Heaven Candle Peak,Bashan, Peach Garden, YuquanTemple, Bamboo Forest Temple, Cherry Orchard and theGreat Wall Ridge Scenic Spots.The number was tremendous difference by different measuresof inducing Monochamus alternatus Hope, among which attractant and living tree was the most effective with the result of70%.The H. cunea could spread naturally and artificially on Mount Tai. The ecologicalcondition are very suitable for the growth of H. cunea, they could occupied all the mountain;at1553.0m, H. cunea could complete one generation in one year at least,2-3generations,two generations or1-2generations could be completed in lower and intermediate altitudes inone year.Based on the above studies, this paper suggests the riskiness management strategies andmeasures mainly of putting prevention first were raised, including preventive measures,emergency preplans and disaster management. Preventive measures mainly included:(1)Preventing of B. xylophilus and H. cunea to import to scenic spot by "64321" quarantinethinking."6" is hoiding6entrances of Mount tai,for example Taohuayu etc."4" is completing4quarantine inspection a year."3" is3department working together."2" is doing wellmechanical and artificial control."1" is building a quarantine station.(2) Reduction of thepopulation density of the vector insects and H. cunea in peripheral zone of scenic spot (3)Enhancing the monitoring and early warning system to B. xylophilus by using vector insects.