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The original item was published from 4/23/2019 4:04:49 PM to 7/1/2019 12:00:02 AM.

News Flash

Weed Management

Posted on: April 23, 2019

[ARCHIVED] Spring 2019 Invasive Weed Management Operations Underway

This schedule is subject to change due to weather or other unforeseen factors.   

The County’s contractor, under the supervision of Natural Channel Design (NCD), is using broadleaf herbicides - Milestone® plus Clean Amine - for these spot treatment operations. These herbicides, which does not target native grasses and dries quickly, are being applied with a blue indicator dye so that treated areas can be clearly identified. Residents are asked to stay off treated areas until the herbicide has dried.

Weed removal operations for this year are scheduled along sections of County roads in the Baderville, Bellemont, Doney Park, Fernwood, Fort Valley, Herold Ranch Road, Kachina Village, Lake Mary Road, Munds Park, Williams and Schultz Flood areas. These operations, which will continue into May, target invasive weeds that include diffuse knapweed, musk thistle, Scotch thistle and bull thistle. These are highly invasive plant species that can quickly dominate areas of disturbance and outcompete desired native vegetation.

Removal of invasive weeds supports native plant revegetation. The timing of treatments is critical to prevent seed set. Spring is the optimal season for herbicide treatment as invasive weeds are small and actively growing. The County also is planning to conduct mechanical weed removal operations on County roads later this summer.

These weed management treatments will help to reduce the populations of invasive weeds along County right of way; however, they will by no means eliminate them. These treatments must be repeated for several years for the long-term successful management of these species because their seeds can live for decades in the soil. Without continued treatments, the populations of these weeds will return to pre-treatment levels within a few years.

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