Executive Summary

Overall, several treatment(s) show promise for individual aspects that we were considering (Anthozanthum odoratum cover, native species cover, and invasive species cover). Currently, no individual treatment tested provides desired levels of all of the measured variables. Future monitoring is necessary to continue to refine the management techniques and provide the most accurate recommendations.

Rose Prairie

In 2015, cover of Anthoxanthum odoratum ranged from <1% to 32%. All glyphosate treatments had lower cover than the control and fusilade treatment. Mean native cover varied significantly. Native cover ranged from 5% to 36%, and was significantly higher in control plots than in any of the treatments. In 2015, mean invasive cover ranged from 3% to 47%, and was significantly higher in control plots than in any of the treatments.

In 2015, native graminoid cover ranged from 2% to 30%, with the control plots having significantly higher cover than any of the treatments. Burn + single application of fusilade had significantly higher cover compared to the remaining treatments. Invasive graminoid cover ranged from <1% to 41%, with the control plots having significantly higher cover than any of the treatments. Native forb cover ranged from 2% to 11%, with the glyphosate 2015 treatment significantly lower than the other treatments.

Fisher Butte

In 2015, Anthoxanthum cover ranged from <1% to 10% and varied among treatments. Control plots had the highest cover (10%), followed by burn + single application of fusilade (7%) and burn + single glyphosate application (4%). The glyphosate 2015 and burn + 2 applications of fusilade had <1% cover. Mean native cover ranged from 3% to 19% and varied significantly among treatments. Control, burn + single application of fusilade, and burn + 2 applications of fusilade had the highest native cover, while the glyphosate 2015 treatment had significantly lower native cover. Invasive cover varied among treatments. Mean cover was significantly lower in the glyphosate 2015 (5%), than in any other treatment.

In 2015, native graminoid cover ranged from <1% to 11%, with significantly higher mean cover in the control plots. Although there were significant differences between the remaining treatments, all had <4% mean graminoid cover. Invasive graminoid cover ranged from <1% to 11% and varied significantly among treatments. Patterns were similar to native graminoid cover, but had more overlap among the higher treatment means. Native forb cover ranged from 2% to 16% and varied significantly among treatments. The control and glyphosate 2015 treatment had significantly lower cover of native forbs. Invasive forb cover ranged from 4% to 33% and varied significantly among treatments. The burn + 2 applications of fusilade had the highest invasive forb cover (34%), followed by the burn + single application of fusilade (22%).