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<br />-.: <br />(4) Beating <br />(a) Adaptation. Limited to stone-free areas supporting <br />stands of mature big sagebrush having a fair to good <br />understory of native grasses, and unless seeding is <br />planned. Not effective on tall tabbitbrush, silver <br />sagebrush, sand sagebrush, black greasewood, five-stamen <br />tamarisk, and other shrubs that sprout from roots when <br />tops are killed or where there are many young, immature <br />plants of any shrub species. <br />(bJ Equipment. Flail rotary and circular beaters, and <br />circular saw-type equipment. <br />(c) Time of Operation. Same as railing and dragging. <br />(b) Methods. Set equipment to operate about four inches <br />above the ground so that Iow brush will be cut or <br />shattered. Adjust travel speed to brush conditions. <br />Reduce speed in heavy brush to permit aZ1 brush to be <br />cut. <br />c. Biological <br />(I) No specific controls for common shrub species are available. <br />The tussock moth attacks old stands of big sagebrush. To <br />encourage its spread, defer grazing of areas infested until <br />late summer and fall. <br />d. Management by Use of Chemicals. See attached guide for specific <br />recommendations for each species. <br />(I) Application. Spray must be applied by helicopter, fixed-wing <br />aircraft, or ground equipment. <br />(a) Aerial Application. Flights must (1) be Iow enough to <br />obtain proper distribution and coverage, ark (2) be made <br />when wind velocities are generally less than five miles <br />pet hour. For many products, air temperature must be <br />above 6U°F (15.5°C) and the plants growing actively. If <br />the soils are dry, the plants may be in a semi-dormancy <br />state and will not accept the herbicide. <br />CAUTION <br />Cooperators using chemical herbicides should be cautioned as follows: <br />Zf herbicides are handled of applied improperly, or if unused portions are <br />not disposed of safely, they may injure humans, domestic animals, desirable <br />plants, and fish or other wildlife and may contaminate nearby crops, other <br />vegetation, and water. Herbicides should not be used over of directly <br />adjacent to ponds, lakes, or streams. Cooperators should be aware of and <br />TG Notice 223 <br />Colorado, SCS, i9ay I)8~ <br />-~- <br />