8.0 PRSR 03-09-2017 - Laserfiche WebLink

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MANAGEMENT PRIORITIES PRIORITY 1: Invasive woody removal Woody Plant Removal Given the size of the property (roughly 24 acres), clearing non-native, invasive brush is a very feasible task. During this process,the site can be assessed for further woody removal,including native shrub species. Primary species to remove are common buckthorn and Tartarian honeysuckle,though black locust and Siberian elm may be encountered as well. Cut stumps should be treated with a triclopyr- or glyphosate-based herbicide,though aquatic formulas should be used within 100 feet of the river. Glyphosate can be applied to stumps on a calm day during the growing season when temperatures are above freezing but not above 85 degrees.Triclopyr can be applied even when temperatures are below freezing,and is the best choice for fall and winter application,though application earlier than late fall is not recommended due to potential non-target effects on native vegetation. If not treated, stumps will sprout with multiple stems,thus creating a difficult situation to control,since even more cutting and herbicide will be required on the multiple resprouts. Use of chemicals should be done with extreme care on this site given the proximity to the rivers and high potential for groundwater contamination. Glyphosate binds to soil particles and is generally not mobile, so may be a better choice than other herbicides that are more mobile,especially near the water. However,triclopry-based herbicides like Garlon are generally more effective at preventing resprouting. Due to the sensitivity of the site, Garlon 3A is preferred over Garlon 4.See Appendix C for more information on controlling both native and non- native species. The locations of remaining non-native brush populations are sporadic,though both buckthorn and honeysuckle are ubiquitous around the property edge. Small populations also exist below many of the large trees that are scattered throughout the grassland. Hand cutting (with brush saws and chainsaws) will be the most efficient method given the distribution of invasive populations. Hand cutting can be done at various times of the year,though the fall is recommended,as native plants will have senesced and buckthorn and other invaders who hold their leaves longer will be easier to identify. For hand-cutting,brush pile locations will need to be determined in order to burn piles safely. Details should be worked out in the field at the time of removal. Brush disposal includes several different options that will be determined as the project progresses,and will depend on the volume as well as site access. Cut brush may be stacked and burned,chipped and blown back on the site, or even removed for biofuels.The biofuels option requires a large amount of material (18 semi-trailer loads of chipped brush,for example),which is unlikely given size of the property, but could be combined with removal of some of the grassland trees (see Priority 2). Friends of the Mississippi River Bailey Point Nature Preserve NRMP 54