Batocera horsfieldi,a forestry pest,was an important stem-borer in *** Pest Risk Analysis(PRA) of *** was evaluated in order to providing more information to prevent the further spreading and intergreted control of th...
详细信息
Batocera horsfieldi,a forestry pest,was an important stem-borer in *** Pest Risk Analysis(PRA) of *** was evaluated in order to providing more information to prevent the further spreading and intergreted control of this *** to the methods of international PRA,the risk level of *** was estimated by qualitative and quantitative analysis,and its control countermeasure was *** results of qualitative analysis showed that *** had lots of hosts,and its wide distribution,high adaptability and the difficulty of eradication made the pest damages forestry production *** to the quantitative analysis,the PRA value of the pest was 2.04,showing that it was one of the high perilous forestry pests in *** and various control measures must be strengthened to prevent the spreading and damage of *** were given that *** would be controlled sustainably by releasing Dastarcus helophoroides,a natural enemy of ***,in damaged forests.
Characteristics of the Osmanthus yunnanensis community distributing in Donglashan region of Hengduanshan Mountain were investigated in this *** results showed that *** community had remarkable change over *** was the ...
详细信息
Characteristics of the Osmanthus yunnanensis community distributing in Donglashan region of Hengduanshan Mountain were investigated in this *** results showed that *** community had remarkable change over *** was the most dominant,though cryptophyta and hemicryptophyta also held big *** plants in the community mainly had simple leaf,non-entire leaf and herby leaf,with medium-sized *** community had obvious layers with simple structure,it could be divided into arbor layer,shrub layer,grass layer and *** community was in the stage of steady succession and *** was the dominant species with important value of 42.47.
暂无评论