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• Mechanical: Hand pulling can be effective if infestation is small enough and prior to <br /> seed set. Mowing is not recommended as plants cut before seed set will produce <br /> new stems and seeds below mower height. <br /> • Biological: Grazing can be effective if timed when green and before seed set. <br /> Known areas of this species do not allow for grazing as they are primarily on <br /> roadsides it would create a hazard for the travelling public. <br /> • Chemical: Contact GCDNR for specific recommendations. <br /> Field Bindweed: Deep rooted perennial forb that spreads prolifically by root and stolons. <br /> It is an aggressive invader that can take over very quickly. Bindweed has been a sporadic <br /> species that seems to be on the rise in Grand County and DNR has been treating to prevent <br /> further spread since 2009. Bindweed is readily transported by equipment including trucks <br /> and cars. CR 1 has a fair size population of Bindweed. Management methods include: <br /> • Cultural: Prevention by minimizing soil disturbance and cleaning equipment before <br /> moving to another area. <br /> • Mechanical: NOT recommended as ANY plant part left behind in or on the soil can <br /> re-root. <br /> • Biological: There are two species of insect available for Bindweed suppression. The <br /> first is a mite,Aceria malherbae, which stunts the growth and seed production of the <br /> plant. The second is a moth, Tyta igg1posa, which has only been able to survive in <br /> the Grand Valley near Grand Junction and NOWHERE else in the country. Not a <br /> viable option for Grand County. <br /> • Chemical: Contact GCDNR for specific recommendations. <br /> Fortunately,you have a very small and manageable population of Noxious weeds on this site. I <br /> think that a site visit twice a year by a licensed herbicide applicator would be sufficient for your <br /> requirements. I say twice a year because these species do not all come up at the same time and <br /> often will send up new plants in the spring as well as in the late summer or fall and one visit may <br /> miss many of the plants. <br /> Please let me know if there is anything else we can help you with. <br /> Thank you, <br /> Amy Sidener <br /> Natural Resource Management Specialist <br /> Grand County Division of Natural Resources <br />