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Chinese Journal of Applied Ecology ›› 2011, Vol. 22 ›› Issue (08): 2126-2132.

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Spatial pattern and its variation of Cnaphalocrocis medinalis larvae and Ummeliata insecticeps under paddy rice cropping neighboring with vegetables or corn.

ZHANG Juan1,2, ZENG Ling1, HUANG Jun3, CHEN Ke-wei1   

  1. 1College of Resources and Environment, South China Agricultural University, Guangzhou 510642, China;2Institute of Insect Sciences, Zhejiang University, Hangzhou 310029, China; 3Research and Development Centre of Flower, Zhejiang Academy of Agricultural Sciences, Hangzhou 311202, China
  • Online:2011-08-18 Published:2011-08-18

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Abstract: Geostatistical methods were adopted to characterize the spatial pattern and its variation of Cnaphalocrocis medinalis larvae (Lepidoptera: Crambidae) and Ummeliata insecticeps (Araneida: Linyphiidae) in the habitats of paddy rice neighboring with white melon, tomato, or corn. In the rice growth period, C. medinalis larvae and U. insecticeps presented aggregative distribution, with the spatial range varied from 1.91 to 182.57 m and from 3.70 to 9.70 m, respectively. Isoline map showed that the density of U. insecticeps was spatially and temporally identical with that of C. medinalis larvae, suggesting that U. insecticeps had strong pursuing and control effects on C. medinalis larvae. Among the test neighboring patterns, paddy rice neighboring with white melon had the best performance of U. insecticeps.

Key words: Cnaphalocrocis medinalis larvae, Ummeliata insecticeps, spatial pattern, spatial variation, geostatistics