Dispersal of Emerald Ash Borer within an Intensively Managed Quarantine Zone

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Figure 1.
Map of Maryland EAB Project detections from 2003 to 2008, showing epicenter at nursery surrounded by initial 2003 eradication zone, and the four most distant emerald ash borer detections each year in 2006, 2007, and 2008.
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Figure 2.
Rates of spread of emerald ash border in kilometers from time of initial detection in 2003. Average rate of spread of the leading edge (solid line) was based on the four most distant grid cells with EAB detections for each year in 2006, 2007, and 2008. Maximum rate of spread (dashed line) was based on the single most distant grid cell with an EAB detection in each year. Fitted lines are linear least square regressions.