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properties may be closed to the public in the event that a broadcast application <br />is necessary and will remain closed at least until the labeled re-entry interval <br />is met. <br />The City uses herbicides in a responsible manner by doing the following: <br />Reducing the amount of herbicides used through the use of IWM. <br />Using herbicides that are in the Environmental Protection <br />Agency's Toxicity Category III or IV, indicating low toxicity <br />levels. <br />Considering the use of herbicides in a Toxicity Category of I or II <br />only when other methods have been determined to be ineffective, <br />cost prohibitive, or unsafe. Having the ability to use various <br />herbicides with different modes of action is critical to prevent the <br />build up of herbicide resistance by populations of noxious weeds. <br />Using herbicides at the lowest recommended rates that are <br />effective to control the targeted weed species. Sometimes using <br />the lowest rate may not control the targeted weed and result in the <br />need for a second herbicide application. Also using low rates that <br />are ineffective may create herbicide resistance in the targeted <br />weed species. For these reasons, the use of higher rates may be <br />recommended. <br />Spot spraying weed infestations whenever possible. Broadcast <br />spraying will only be used on large infestations where spot <br />spraying would be ineffective or too time consuming and costly. <br />1. Beneficial Uses <br />a. Controls large infestations in which other methods would be <br />time consuming and cost prohibitive <br />b. Controls infestations of rhizomatous and perennial weed <br />species (Colorado Natural Areas Program, 2000) <br />c. Eradicate high priority List A species that require a fast <br />response as required by the Colorado Noxious Weed Act <br />d. Clear fields of vegetation in preparation for grassland reseeding <br />e. Prevent weed establishment following a prescribed burn <br />2. Limitations <br />a. Inability to spray certain herbicides near water <br />b. Public sensitivity to herbicide use <br />c. Formation of herbicide resistance <br />d. Possible damage to non -target vegetation <br />3. Methods <br />a. Backpack sprayer <br />b. Spray bottles <br />c. Wicks <br />d. Paintbrushes <br />e. ATV or truck mounted hand guns/wands <br />f. ATV or truck mounted booms <br />g. Aerial applications <br />V1V11. Priority Weed Infestations <br />16 <br />Integrated Weed Management Plan 12 <br />