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<p><font face="Helvetica, Arial, sans-serif">I was recently sent the
attached two photos of what looks like Fallopia japonica (aka
Polygonum cuspidatum and Reynoutria japonica), which were taken
in May. Apparently, the homeowners, whose property borders Back
River in Baltimore County near Rock Creek Park, Maryland, are
quite pleased with their decision to plant “Japanese bamboo” to
reduce erosion.<br>
<br>
I’m concerned because Fallopia japonica can live in salt
environments, such as salt marshes. I’ve been informed that the
mouth of Back River is at the southern edge of the fresh water
zone of the Chesapeake Bay with average salinity of 6 ppt, but
salinity can range from <1 ppt to 10 ppt depending on weather
conditions. I’m assuming that the pieces of rhizomes that might
break off in a major storm could survive in Back River to
colonize other areas, especially if the storm reduced the
salinity in the river. Does anyone know if this is correct?
Also, would the seeds remain viable if they were transported to
another location by Back River?<br>
<br>
If the homeowners were convinced to remove their Fallopia
japonica, what would be the best way to eradicate it so near the
water? Something like Rodeo plus a non-ionic surfactant? <br>
<br>
Thanks for your advice. <br>
<br>
Judy</font><br>
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<div class="moz-signature">____________________________________________<br>
<br>
Judith P. Fulton<br>
Consultant, University of Maryland Extension<br>
Master Gardener, University of Maryland Extension<br>
Chair, Maryland Invasive Species Council Subcommittee on Invasives
Lists<br>
410-337-3701<br>
<a class="moz-txt-link-abbreviated"
href="mailto:jfulton5@gmail.com">jfulton5@gmail.com</a></div>
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