摘要
【目的】明确化学防治对中国梨喀木虱Cacopsylla chinensis种群动态的影响机制,揭示香梨园中中国梨喀木虱的空间分布规律,确定合理的虫害防治措施。【方法】以中国梨喀木虱为研究对象,采用聚集度指标、Iwao回归分析法和Taylor幂函数法分析中国梨喀木虱种群的空间分布格局和聚集因素,根据Iwao的理论抽样数模型确定最适理论抽样数。【结果】化学防治模式下的中国梨喀木虱种群在库尔勒地区全年发生2次高峰,在香梨不同生育期的空间分布均为聚集分布。化学防控可改变中国梨喀木虱种群数量变化,从而改变聚集指标值,使聚集强度(m′)呈波浪形变化。负二项分布参数(k)大于1,种群聚集均数(λ)小于2,说明中国梨喀木虱的种群聚集主要是由于环境因素作用。Iwao回归分析法显示中国梨喀木虱个体间相互吸引,分布的基本成分是个体群。幂函数法分析表明,中国梨喀木虱种群聚集度依赖密度,且随着平均密度的升高聚集程度越强。中国梨喀木虱的理论抽样方程为N=(1/D)^(2)(1.3232/m+1.8609),序贯抽样方程为T=nm_(0)±t√n(1.3232m_(0)+1.8609m_(0))。【结论】化学防控对中国梨喀木虱种群密度、聚集度指标和聚集均数均有影响。化学防控只能改变种群聚集指标高低,降低聚集均数并不能改变其聚集特性。当k<1且λ>2时(即m>3.2656头/叶),可实施化学防控干预。建立的理论抽样模型和序贯抽样模型均能准确计算出最适理论抽样数和种群数量。
【Objective】To clarify the influence mechanism of chemical control on the population dynamics of Cacopsylla chinensis,reveal the spatial distribution law of C.chinensis,and determine reasonable pes control measures.【Method】Taking C.chinensis as the research object,the spatial distribution pattern and aggregation factors of the population of C.chinensis were analyzed by using the aggregation index,Iwao regression analysis method and Taylor power law,and the optimal theoretical sampling number was determined according to the theoretical sampling number model of Iwo.【Result】The population of C.chinensis under chemical control mode had secondary peaks in Korla.The spatial distribution in different reproductive stages was aggregated.Chemical control changed the population number change of C.chinensis,thus changing the aggregation index value,so that the aggregation intensity m′value was wavy,the parameter of the negative binomial distribution(k)was greater than 1,and the gather the meanλwas less than 2,indicating that the population aggregation of C.chinensis was mainly caused by environmental factors.Iwo regression analysis showed that the mutual attraction and the basic component of distribution were individual groups.Taylor Power rule analysis showed that the aggregation of the population was density dependent and was stronger with increasing average density.Theoretical sampling equation N=(1/D)^(2)(1.3232/m+1.8609),and the sequential sampling equation was T=nm_(0)±t√n(1.3232m_(0)+1.8609m_(0)).【Conclusion】Chemical control affected the population density,aggregation index and mean aggregation of C.chinensis.Chemical control can only change the high and low values of population aggregation index and reduce the mean value of aggregation,but cannot change its aggregation characteristics.When k<1 andλ>2(m>3.2656 heads/leaf),chemical control intervention can be implemented.The established theoretical sampling model and sequential sampling model can accurately calculate the optimal theoretical sampling number and population size.
作者
蒋世铮
王俊刚
于恬
王小兵
JIANG Shizheng;WANG Jungang;YU Tian;WANG Xiaobing(Xinjiang Bayingol Mongolian Autonomous Prefecture Agricultural Research Institute,Korla 841000,Xinjiang,China;College of Agriculture,Shihezi University,Shihezi 832000,Xinjiang,China;Xinjiang Production and Construction Corps Second Division Forestry and Grassland Bureau,Tiemenguan 841007,Xinjiang,China)
出处
《经济林研究》
北大核心
2025年第3期261-267,312,共8页
Non-wood Forest Research
基金
新疆现代农业(香梨)产业技术体系项目(XJLGCYJSTX05-2024-10)
兵团科技攻关项目(2019AB023)。
关键词
中国梨喀木虱
香梨
空间分布
抽样模型
Cacopsylla chinensis
pear
spatial distribution
sampling model
