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Future Weed Management Recommendations <br />Habitat Management's ongoing weed control efforts have revealed yellow toadflax to be <br />the most widespread and invasive noxious weed currently infesting the Climax Mine <br />property. Ongoing, intensive efforts will be required to keep this perennial species from <br />further spreading into new areas. This species has been observed to proliferate in <br />proximity to continually disturbed roads and waterways throughout the mine. As yellow <br />toadflax primarily reproduces vegetatively through root buds, the weed becomes <br />increasingly difficult to eradicate from a site upon which it has become established, even <br />with repeated treatment. Early season treatment in areas of known infestation and late <br />season treatment in new areas of infestation should be continued on a regular, ongoing <br />basis to ensure proper translocation of chemical to root buds and to reduce the existing <br />soil seed bank. Areas of highest priority for early season spraying in 2011 should include <br />Eagle Park Reservoir and roads leading east from 4 Dam, the northern side of the <br />Arkansas Gravel Pit Reclamation Area, the western side of Mayflower Tailings Pond, <br />cut-slopes adjacent to the northern length of the West Interceptor Road, and roads and <br />wooded areas in the vicinity of the Mayflower treatment plant. Additionally, all areas of <br />recent disturbance should be monitored for emerging infestations throughout the growing <br />season for late season treatment. <br />Although less persistent as an annual noxious weed, mayweed chamomile has posed a <br />problem on the biosolid stockpiles in past years, but seems to be declining significantly <br />with subsequent treatments. During 2007, a population of mayweed chamomile was <br />hauled and spread to reclamation sites throughout the mine. Robinson Tailings Pond <br />reclamation and Storke Yard were spread with some of these biosolids in 2006 and were <br />found to be growing substantial patches of this weed in 2009, although virtually no <br />mayweed chamomile was located in these areas in 2010. The weed seems to be <br />persisting; however, throughout the reclamation areas on both sides of the Arkansas <br />River Restoration Project and additional treatment will likely be necessary in 2011. <br />Areas spread with biosolids during 2007-2010 and areas scheduled for biosolid <br />Climax Mine: IPM Report <br />5 <br />February 2011