Spatial structure and pattern of Nilaparvata lugens population in large scale

Abstract

Abstract: Brown planthopper(BPH),Nilaparvata lugens,is a major pest of rice.Its spatial distribution of different generations in Guangdong Province was studied by using variograms.The results showed that this population distributed in a clump pattern in rice fields during the 1st rice season.3 generations of this population had different spatial structures,with the clump range of 400km,200km and 205km respectively in the 1st rice season.The simulation distribution maps of BPH,which was interpolated by Ordinary Kriging,showed that the density of BPH populations in west Guangdong province were higher than that in the east.The effect of sampling size on the spatial structure of BPH was not significant.

Key words: Variograms, Ordinary Kriging, Nilaparvata lugens, Spatial structure

CLC Number:

S435.112.⁺2

ZHOU Qiang, ZHANG Runjie, GU Dexiang . Spatial structure and pattern of Nilaparvata lugens population in large scale[J]. Chinese Journal of Applied Ecology, 2001, (2): 249-252.

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Spatial structure and pattern of Nilaparvata lugens population in large scale

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