As a basis for the development of both eradication and management strategies for control of Anoplophora glabripennis Motschulsky (Asian longhorned beetle) investigations of A. glabripennis dispersal were undertaken in Gansu Province, China, in 1999. Data analysis of the first year study of population dispersal, in which >16,000 adult A. glabripennis were marked and released (mass-mark recapture method), has shown that the mean dispersal distance for A. glabripennis was ≈266 m, whereas the 98% A. glabripennis recapture radius was 560 m. More notably, A. glabripennis dispersal potential over a single season was found to be 1,029 m and 1,442 m, for male and gravid female beetles, respectively, which is well over the previously reported distances. There was also a directional bias in dispersal. These results indicate that surveys for adult beetles and infested trees at a minimum of 1,500 m from previously infested trees would assist in preventing continued colonization in the current U.S. infestations in New York and Chicago, and therefore enhance efforts to eradicate A. glabripennis from the United States. Data from the second year of this study (2000) will be used to enhance a predictive model of invasion by A. glabripennis in landscapes at risk in the United States.
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