In order to clarify the spatial distribution pattern and theoretical sampling technique of the codling moth Cydia pomonella(L.)adult in apple orchards in Xiaohaizi Reclamation Area of Southern Xinjiang.The spatial distribution pattern of codling moth adults was analyzed by using aggregation index,Iwao regressive analysis and Taylor power law,and Iwao theoretical sampling and sequential sampling techniques were used to establish the most suitable sampling model and sampling size for the field survey.The results indicated that the distribution pattern was influenced by the density of codling moth,and when the average density of codling moth adult(m)is>5,distributing basic element is massing of individual and massing intension would increase along with increase of gropes density,caused by the joint action of the aggregative habit of individual adult and environmental factors.When there is m≤5,the individuals will repel one another.The theoretical sampling model of codling moth adult under different population densities and the sequential sampling technique based on control indicators were further analyzed and proposed,which would provide technical support for the scientific investigation and control of codling moth populations in the orchard.
apple orchardsCydia pomonellaspatial distribution patternsampling technique
维普
万方数据
