地形因子对刚竹毒蛾危害的影响初探

刚竹毒蛾是竹的最主要食叶性害虫,严重影响竹林健康与竹业生产,掌握其空间分异规律对开展该虫害的监测与防控工作具有重要意义。以福建省延平区为研究区,基于刚竹毒蛾危害分布与地形数据,采用空间叠置分析等方法,统计不同地形条件下虫害分布占比,依此探究地形因子对该虫害的影响。结果表明,随着海拔、坡度的升高,虫害分布占比呈现先升后降特征,海拔500~800 m、坡度10°~24°为主要危害区域;东、东北、东南3个坡向的虫害分布占比最高,合计达57.09%;虫害与坡位的关系表现为“高集中”特征,主要分布于山脊,占比高达71.63%;其次为山谷,占比21.94%。该文证实地形因子对刚竹毒蛾危害具有重要影响,据此建议对海拔500~800 m,坡度10°~24°,东向、东北向、东南向及山脊、山谷区域的虫害予以重点监测与防控。

Preliminary Study on the Influence of Topographic Factors on the Damage of Pantana phyllostachysae Chao

Pantana phyllostachysae Chao is the most important leafeating pest of bamboo,which seriously affects the health of bamboo forests and bamboo production.Mastering the law of spatial differentiation is of great significance for the monitoring and prevention of this pest.Taking Yanping District of Fujian Province as the study area,based on the hazard distribution and topographic data of the P.phyllostachysae,spatial overlay analysis was used to calculate the proportion of pest distribution under different topographic conditions,and the influence of topographic factors on the pests was explored.The results showed that with the increase of altitude and slope,the distribution of pests had the characteristics of increasing first and then decreasing,with the altitude of 500-800 m and the slope of 10°-24°being the main.The east,northeast and southeast were the highest proportion of pests,with the total proportion of 57.09%.The relationship between pests and slopes was characterized by"high concentration",which was mainly distributed on ridges,accounting for 71.63%,followed by valleys,accounting for 21.94%.This paper confirms that the topographic factors have an important impact on the damage of the P.phyllostachysae.According to this,we will focus on monitoring and controlling pests in the east,northeast,southeast,and ridge and valley areas at an altitude of 500-800 m and a slope of 10°-24°.