仓储面粉中腐食酪螨自然种群消长动态及空间分布型研究

目的探讨腐食酪螨自然种群季节性消长动态及其在芜湖市仓储面粉中的空间分布型,为腐食酪螨的防制提供理论依据。方法自2013-1-2013-12,选择芜湖市区5个采样点,每月进行定点采样,鉴定及计数其中的腐食酪螨。运用扩散型指标、Iwao m*--x回归方程及Taylor lg S2-lg-x回归分析研究腐食酪螨种群在仓库面粉中的空间分布特征。结果芜湖市区仓储面粉中的腐食酪螨高峰期在7月和9月。扩散型指标I0,CA0,m*/-x1;Iwao的线性回归方程为m*=3.740 3+1.017 5-x(r=0.995 8),Taylor线性回归方程为lg S2=0.500 4+1.134 9 lg-x(r=0.832 8),表明腐食酪螨在仓储面粉中为聚集分布。结论腐食酪螨在芜湖市仓储面粉中的自然种群季节性消长呈双峰型,空间格局为聚集分布。

Study on natural population dynamics and spatial distribution pattern of Tyrophagus putrescentiae in stored flour

Objective To understand the natural population dynamics and spatial distribution of Tyrophagus putrescentiae in storage flour, so as to provide an evidence for its prevention and control. Methods The samples from five sampling points in Wuhu City were collected monthly from January to December, 2013, and examined and counted for T. putrescentiae. The dispersion pattern target, Iwao’s m*?[x] regression analysis and Taylor’s lgS2?lg[x] regression analysis were used for analyzing the spatial distribution pattern of T. putrescentiae in the storage flour. Results The peaks of population dynamics of T. putrescentiae were discovered in July and September. The indexes of dispersion were as follows： I > 0, CA > 0, m*/[x] > 1; and the linear regression equation of Iwao： m* = 3.740 3 + 1.017 5[x] （r = 0.995 8） and Taylor： lgS2 = 0.500 4 + 1.134 9 lg[x] （r =0.832 8） showed that the spatial distribution pattern of T. putrescentiae in the storage flour was assembled. Conclusion The peak of population dynamics of T. putrescentiae in the storage flour in Wuhu City is a double peak type, and the spatial distribution pattern of T. putrescentiae is assembled.