Spatial distribution of  (Lepidoptera: Cossidae) pupae
in a seabuckthorn () stand

doi:10.1007/s11515-008-0037-7

Front. Biol.

2008, Vol. 3

Issue (2) : 213-218 https://doi.org/10.1007/s11515-008-0037-7

Spatial distribution of (Lepidoptera: Cossidae) pupae in a seabuckthorn () stand

ZONG Shixiang¹, LUO Youqing¹, XU Zhichun¹, WANG Tao², Kari Heliovaara³

1.The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University; 2.Mentougou Forestry Station; 3.Department of Forest Ecology, University of Helsinki

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Abstract The seabuckthorn carpenter moth, Holcocerus hippophaecolus, which has a generation time of four years, is recently becoming one of the major pests of the seabuckthorn (Hippophae rhamnoides) in Inner Mongolia, Liaoning, Shanxi, Ningxia and Shaanxi of China (Hua et al., 1990). The larvae of the H. hippophaecolus mainly damage the stems and roots of the seabuckthorn, and the mature larvae pupate in the soil. The spatial distribution of the pupae was analyzed by using biostatistics and geostatistics in order to effectively control the insect and further study the spatial distribution of the population. Results show that most of the pupae (90%) had an eclosion time span from early June to the end of July. The sex ratio of the pupae was nearly 1:1 in the woodland samples. In addition, 24.3% of the 971 trees investigated had pupae and it ranged from 0 to 4 per tree within a distance of 1.3 m from the base of the stem. 90% of the pupae were aggregated within a distance of 1 m from the base of the stem. The pupae show intense spatial aggregation in the sampled woodland which had an 11.1 m spatial dependence and a 90.7% intensity in the local spatial continuity. Moreover, the population presented an intensive spotted distribution and many aggregated spots were found in the woodlands. As for the relationship between grid size and variogram of the pupae, the variations in the range, the intensity of local spatial continuity and the sill were all very low or non-existent when the grid size was 5 m, 6 m or 7 m. Whereas, the value of the decisive coefficient was the biggest when the grid size was 5 m making it the ideal grid size.

Issue Date: 05 June 2008

Cite this article:

ZONG Shixiang,LUO Youqing,Kari Heliovaara, et al. Spatial distribution of (Lepidoptera: Cossidae) pupae in a seabuckthorn () stand[J]. Front. Biol., 2008, 3(2): 213-218.

URL:

https://academic.hep.com.cn/fib/EN/10.1007/s11515-008-0037-7
https://academic.hep.com.cn/fib/EN/Y2008/V3/I2/213

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