Laserfiche WebLink
mealy bug is not adapted to colder,drier environments the types of application equipment to use. Again,do <br /> and was released outside Nevada. The leaf beetle was not disturb salteedar-treated with imazapyr for two <br /> released at Schurz, Stillwater,and Lovelock,Nevada years or burn the treated stand after it has dried. For <br /> after it was established that it eats only saltcedar and tional�nsi see Table 1. <br /> not valuable natives,ornamentals or crops. Research <br /> continues on its adaptability,reproductive ecology and When applying herbicides, always follow the <br /> predation of saltcedar in Nevada. directions on the label. Failure to do so violates <br /> MECHANICAL CONTROL the law. Following the instructions protects the <br /> Plowing, cutting,mowing, chaining and burning applicator, other workers, non-target plants and <br /> have been attempted to control saltcedar. All have animals, and our environment. It also reduces <br /> failed on large-scale projects because saltcedar liability for any damages incurred. <br /> resprouts profusely following mechanical treatments. <br /> Success has been achieved after a fire when the root <br /> crowns are removed before the next growing season <br /> and all new growth is removed as it occurs. <br /> Flooding saltcedar for one or two years is effective. SUSTAINABLE MANAGEMENT <br /> Small plants,if completely covered, easily succumb. Treated areas should be revegetated and properly <br /> The root crown and most of the shoots must be covered managed. Successful saltcedar control and revegetation <br /> completely for months to successfully kill larger is difficult for these reasons: <br /> plants. �-- <br /> The accumulation of salt on the soil's surface <br /> Only two herbicides effectively hinders the establishment of desirable plants. <br /> triclopyr(Garlon 4)and imazapyr 991M. After • The understory species in many saltcedar <br /> applying either product,do not disturb the saltcedar fo infestations is desert saltgrass,which is damaged <br /> two years. This allows the herbicide time to move or killed by imazapyr. The area has to be tilled to <br /> throughout the entire plant, especially the root system break up the saltgrass sod and turn the salts under <br /> and kill it. Applying 2,4-D,picloram, or glyphosate t before seed of other species can be broadcast or <br /> saltcedar does not control it. drilled. <br /> Saltcedar usually produces a multi-stemmed • Removal of the limbs and roots of saltcedar is <br /> shrubby tree. In the Walker River Delta,there are difficult and expensive. If the trees are large, <br /> 60,000 stems per acre,many of them less than one inch chainsaws and a caterpillar are used to remove the <br /> in diameter. This makes navigating the area and biomass and deep rip the roots. <br /> applying chemicals difficult, even hazardous. Exercise • Burning the treated area results in sprouting from <br /> care in handling herbicides while moving among the the roots. Two growing seasons must elapse for <br /> stems to avoid spilling it on yourself,others,or the herbicide to kill the roots so that the saltcedar <br /> contaminating the area. will not regrow when the shots are removed or <br /> Cut saltcedar stems off at ground level and burned. <br /> immediately paint the cut surface with full strength Other aspects must be considered when controlling and <br /> Garlon 4,the ester formulation of triclopyr. (Specific removing saltcedar. The plant plays an important part <br /> instructions limit the use of triclopyr near water and in in bank stabilization on Nevada's desert river systems. <br /> wetlands.) Apply the herbicide with a brush within ten Loss of stabilization must be compensated for in any <br /> minutes,sooner is better. Triclopyr can also be applie control program. Control of saltcedar in the Walker <br /> as a basal stem treatment mixed with metylated seed River Delta and the Virgin River Valley may result in <br /> oil as a carrier(see the label for directions on mixing additional erosion of highly salt-affected soils, <br /> the two). Stems must be treated all the way around, increasing the salt content of nearby waters. <br /> which can be difficult in heavy stands. Stem -- Along the Carson, Humboldt, Muddy, Truckee, <br /> treatments can be used on stems up to three inches in Walker and Virgin Rivers or other riparian <br /> diameter. This requires less labor than painting the c communities where saltcedar is established, selective <br /> surface of stems. Both applications use large amoun control is necessary. Reestablishment of native woody <br /> of herbicide per acre, are labor intensive,and time vegetation may prove difficult requiring changes in <br /> consuming. management of the riparian woodlands to prevent <br /> The only effective foliar-applied herbicide for pollution of nearby waters and re-establishment of <br /> saltcedar is imazapyr. Follow the label instructions saltcedar. <br /> regarding application rates,use of an oil carrier, and <br />