Biological Control of Garlic Mustard

Results of Host Range TestsC. scrobicollis• No plant species outside of the Brassicaceae family wereattacked by C. scrobicollis.• Within the Brassicaceae family, many plant species wereaccepted for oviposition but did not support larvaldevelopment.• In larval development testing, only one native mustardspecies (Rorippa sinuata) supported the development ofadults.• When both garlic mustard and Rorippa sinuata wereincluded in single choice testing, only garlic mustard wasattacked. We believe that under field conditions, the risk ofattack to Rorripa sinuata is very low.