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LIST B <br /> Russian olive - Elaeagnus angustifolia <br /> A fast-growing perennial shrub or small tree (up to 30 feet) that <br /> reproduces through adventitious roots and seed production. It <br /> possesses an extensive root system, and can grow on bare, mineral <br /> substrates within the soil. It tolerates many soil, light, and moisture <br /> conditions, but prefers open, moist riparian areas and often out- <br /> competes native riparian vegetation. Prior to being listed as a <br /> noxious weed by the CDA, it was commonly used for erosion control <br /> and can be found in home landscaping. <br /> Identification: <br /> • Leaves: Narrow, linear, upper surface is light green, lower <br /> surface is silvery white. <br /> • Branches: Young twigs, reddish and flexible with 1 " to 2" thorns. <br /> Fruit: Olive-shaped, become yellow-red when mature. <br /> Control methods: <br /> Biological: <br /> Tubercularia canker is an unapproved bio-control; however, it can <br /> girdle entire stems and kill stressed plants over time. <br /> Mechanical: <br /> Cut trees, then immediately treat stumps with a herbicide to <br /> prevent re-sprouting. <br /> Chemical: <br /> Triclopyr.- Apply to the cambial layer of the tree immediately <br /> after the stump is cut. <br /> Imazapyr. Apply to the cambial layer of the tree immediately <br /> after the stump is cut, or use as a broadcast spray. <br /> 44 <br />