| 生物土壤与生态 |
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| Studies on Spatial Distribution and Sampling Methods of Bruchidius ptilinoides Faharaeus and Bruchophagus gtycelizae Nikolskya |
| YANG Fang1, HE Da-han1, ZHANG Da-zhi2 |
| 1.Agricultural School, Ningxia University, Yinchuan 750021, China; 2.Life Science School, Ningxia University, Yinchuan 750021, China |
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Abstract Five indices of judging the aggregation of spatial distribution pattern, Tayler Index and Iwao Regression Method were applied to analyze the distribution of Bruchidius ptilinoides Faharaeus and Bruchophagus gtycelizae Nikolskya larvae. The results showed that the spatial distribution of Bruchidius ptilinoides Faharaeus was negative binomial pattern, and Bruchophagus gtycelizae Nikolskya conformed to either the pattern of aggregation or the negative binomial distribution, and the mixed pests population was aggregative distribution too. Optimum sampling method for investigating infestations was formulated through the Iwaos m*-m regression equation.
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Received: 22 May 2007
Published: 20 July 2008
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2008, Vol. 28 
