Laserfiche WebLink
to the sparse distribution of salt cedar on the property, basal and cut -stump applications are <br />preferred to foliar applications which could result in impact to nearby desirable vegetation. <br />Basal bark application can be accomplished by applying triclopyr mixed with commercially <br />available basal bark oil or vegetable oil to the stem of the plant from the root collar area up the <br />stem approximately 18 inches from the ground. Basal bark treatment can be conducted any time <br />of the year except when the bark is frozen or when the presence of snow or water prevents <br />spraying the root collar. <br />Cut -stump application can be accomplished by cutting the stem of the plant as close to the <br />ground as possible (preferably 2 inches or less) and immediately (within 60 seconds) applying <br />imazapyr to the entire circumference of the cut stump. This will allow the herbicide to <br />translocate to the roots of the plant, thus killing it. Cut stems and branches should be carefully <br />removed from the property to limit spread of seeds (e.g., by placing them in a plastic bag) and <br />disposed of properly off site (e.g., chipping and placing in a solid waste landfill). Cut stems and <br />branches should not be used for mulch or left on site or near any water or moist areas due to the <br />risk of new plants sprouting. Cut -stump treatment can be applied anytime during the year except <br />when the presence of snow or water prevents spraying the cut stump. The ideal time is during <br />late summer or fall when the plant is actively translocating nutrients to the root system. <br />Foliar application can be accomplished by spraying the leaves of the plant with imazapyr or a <br />mixture of imazapyr and glyphosate. This method is most effective when applied between June <br />and September. Complete foliar coverage of individual plants is necessary and caution should be <br />used to not adversely affect adjacent desirable vegetation (both imazapyr and glyphosate will kill <br />most if not all plants that intercept the spray). <br />6.2.1.3 Biological <br />Biological control includes use of livestock or insects to consume the plants. For the Carma <br />Bayshore site, only the use of insects is being considered. The salt cedar leaf beetle, Diorhabda <br />elongate has been widely researched and used to effectively feed on the foliage to eventually kill <br />salt cedar in the western United States. The salt cedar leaf beetle does not feed or develop on <br />any other plant than members of the genus Tamarix. The larvae feed on salt cedar foliage for <br />about three weeks at which time they crawl or drop to the ground and pupate; adult beetles <br />emerge and feed on the foliage. They over - winter as adults and emerge the following spring to <br />lay eggs. <br />6.2.1.4 Cultural <br />Cultural control includes the planting of other desirable plants such as fremont cottonwood <br />(Populus_fremontii) and willows that will out - compete the salt cedar. <br />6.2.1.5 Integrated Weed Management Recommendations <br />Integrated weed management for salt cedar includes the combination of mechanical and chemical <br />control. Cultural control should be included with all methods. <br />Weed Management Plan 6 <br />