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Your Position :Home->Past Journals Catalog->2015年52 No.6

Expansion of Solenopsis invicta Buren in Fujian Province
Author of the article:ZHANG Xiang1, 2** CHEN Yi-Xin1, 2, 3 HOU You-Ming1, 2*** XIE Yi-Xuan4
Author's Workplace:1. Fujian Provincial Key Laboratory of Insect Ecology, Department of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China; 2. Key Laboratory of Integrated Pest Management on Crops in Fujian-Taiwan, Ministry of Agriculture, P. R. China, Fuzhou 350002, China; 3. Institute of Plant Protection, Fujian Academy of Agricultural Sciences, Fuzhou 350013, China; 4. Plant Protection and Quarantine Station of Xiamen, Xiamen 361000, China
Key Words:Solenopsis invicta, intrusion period, different habitats, mound, fitting model
Abstract: [Objectives]  The red imported fire ant, Solenopsis invicta Buren, is a devastating invasive species that has had severe effects on the ecological environment, agriculture, and public safety in many countries. This paper aims to provide better understanding of the spread of this pest in newly colonized areas, to trace to the invasion history of S. invicta, and provide important theoretical references for the prevention of the establishment of this pest. [Methods]  The primary parameters of invasion by S. invicta in Fujian Province were analyzed using a model fitting method. Models of the relationships between intrusion period and the number of mounds, as well as mound density in the invaded range and in different habitats, were constructed. [Results]  The results suggest that different populations exhibited different patterns of invasion in response to habitat differences. Populations imported with reusable resources have so far occupied only relatively small ranges and their rate of invasion has been relatively slow (28.1-116.4 m/year). In contrast, populations that were imported with greensward and saplings have relatively large ranges and spread relatively rapidly (126.1-555.5m/year). [ConclusionModels relating to mound density, number of mounds and intrusion period were constructed as followed: N=1003.9Ln(t)+336.27, D=0.0966e0.583t, where t denotes the intrusion period, N denotes the number of mounds and D denotes the density of mounds. These models can be used to predict the temporal scope of three intrusion events.
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