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United States Department of Agriculture

Agricultural Research Service

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Image Number D1495-1

In Urbana, Illinois, ecologist Adam Davis records the position of garlic mustard rosettes (clusters of green leaves low to the ground) on a sheet of transparent mylar. The locations are recorded in June and October of the first year and in June the following year to estimate rosette survival rates.  Once garlic mustard rosette locations are recorded, they are then converted into digital coordinates in a GIS (geographical information system) program, permitting spatial analysis of rosette survival.


Photo by Peggy Greb.

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Last Modified: 8/13/2016
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