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Published on: September 21, 2012
[Study on natural population dynamics and spatial distribution pattern of Tyrophagus putrescentiae in stored flour]
Zhan Xiao-Dong1,2, Guo Wei2, Chai Qiang2
1College of Life Sciences, Anhui Normal University, Wuhu 241000, China.
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*- x̄; regression analysis and Taylor's lgS-lg x̄; 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*/ x̄; > 1; and the linear regression equation of Iwao:m* = 3.740 3 + 1.017 5 x̄; (r = 0.995 8) and Taylor:lgS = 0.500 4 + 1.134 9 lg x̄; (r =0.832 8) showed that the spatial distribution pattern of T. putrescentiae in the storage flour was assembled.
Conclusions:
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.
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