农业科学研究2024，Vol.45Issue(1)：56-60,73,6.
青海云杉一种重要害虫烟翅腮扁蜂越冬幼虫的空间分布型与抽样技术
Spatial Distribution Patterns and Sampling Techniques of Overwintering Larvae of Cephalcia infumata-An Important Pest in Picea crassifolia
摘要
Abstract
This study investigates the spatial distribution of the overwintering larvae of Cephalcia infumata in the soil to provide a scientific basis for its prediction and control.The spatial distribution pattern of the overwintering larvae was analyzed by using aggregation index method,Taylor's power law and Iwao's regression method.The theoretical number of overwintering larvae was determined based on the Iwao regression model,and the maximum theoretical sampling numbers under different permissible errors(D=0.1,0.2,0.3)and economic thresholds(=3,5,10 individuals/plant)were obtained through sequential sampling techniques.The results show that in the forest area of the Ningxia Luoshan Nature Reserve,Cephalcia infumata produces one generation per year,with overwintering larvae mainly distributed in the soil at depths of 0～10 cm.The larvae are more abundant on sunny slopes and show an aggregated distribution that fits the negative binomial distribution.The mean aggregation of the population shows a linear relationship with the average population density,and the intensity of aggregation increases with population density.Based on the Iwao regression model,at t=1.96,the maximum theoretical sampling numbers were 596,149 and 66 plants for =3 and D= 0.1,0.2,and 0.3,respectively;477,119 and 53 plants for =5 and D=0.1,0.2,and 0.3,respectively;and 388,97,and 43 plants for =10 and D=0.1,0.2,and 0.3,respectively.The spatial distribution pattern of Cephalcia infumata was aggregated,mainly occurring at the forest edge.The maximum sampling number determined by sequential sampling can be used to guide the monitoring and control of Cephalcia infumata.关键词
烟翅腮扁蜂/越冬幼虫/空间分布/抽样技术Key words
Cephalcia infumata/overwintering larvae/spatial distribution/sampling technique分类
农业科技引用本文复制引用
张鑫,刘超,马嘉瑜,兰珍珍,王新谱..青海云杉一种重要害虫烟翅腮扁蜂越冬幼虫的空间分布型与抽样技术[J].农业科学研究,2024,45(1):56-60,73,6.基金项目
宁夏重点研发计划项目(2021BEG02009) （2021BEG02009）
宁夏罗山国家级自然保护区管理局横向课题 （）
