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Invasive Species Management

Aug 05

[ARCHIVED] August Work Plan

The original item was published from August 5, 2021 8:45 AM to August 5, 2021 8:55 AM

Each month we will provide a work plan for the noxious weeds that are active.  To find out more about each weed visit our website jeffco.us/jcism

WeedStageActionPlant InfoNotes
Canada thistle (option 1)Flowering, dropping seedClip, bag, and put into trashPerennial
Deep spreading roots
Reproduces by seed and spreading roots
Do NOT pull.  Pulling breaks the root and creates new plants.
The majority of the seeds are sterile.     Most seed drops near the mother plant
Canada thistle (option 2)Flowering, dropping seedTreat plants with herbicide

Canada thistle (option 3)Flowering, dropping seedMow and follow up with herbicide treatment in 1 month

ChamomileFlowering, dropping seedRemove, bag, put into trashPerennial
Fibrous roots
Reproduces by seed

Common mulleinFlowering, dropping seedRemove, bag, put into trashBiennial
Taproot
Reproduces by seed
This is not the time of year to treat Common mullein with herbicide.  
Next year plan on doing your removal in the spring and early summer before the flowerbuds form (when plants are less than 12 inches tall)
Diffuse knapweedFlowering, dropping seedRemove, bag, put into trashBiennial
Taproot
Reproduces by seed

Hairy willowherbFlowering, dropping seedTreat plants with herbicidePerennial
Spreading roots
Reproduces by seed and spreading roots

KnotweedFlowering, dropping seedTreat plants with herbicidePerennial
Spreading roots
Reproduces by seed, spreading roots, and plant fragments

Musk thistleFlowering, dropping seedRemove flowers, bag, put into trashBiennial
Taproot
Reproduces by seed
This is not the time of year to treat Musk thistle with herbicide.    
Next year plan on doing your removal in the spring and early summer before the flowerbuds form (when plants are less than 12 inches tall)
Oxeye daisyFlowering, dropping seedRemove, bag, put into trashPerennial
Fibrous roots
Reproduces by seed

Purple loosestrifeFlowering, dropping seedTreat plants with herbicidePerennial
Deep spreading roots
Reproduces by seed, spreading roots, and plant fragments

All OthersMap the locations and create a management plan for fall