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    Infestation (3)
    Biological Control (2)
    Flower(s) (1)
    Monitoring (1)
    Plant(s) (1)

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Natural Resources: Weeds

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Image Subject Name Scientific Name Description
1350077 knapweeds Centaurea spp.
1350038 yellow starthistle Centaurea solstitialis example of yellow starthistle infestation suitable for a biological control program
1350045 spotted knapweed Centaurea stoebe ssp. micranthos in Northern Idaho
1350069 spotted knapweed Centaurea stoebe ssp. micranthos suitable for a biocontrol program
1350068 spotted knapweed Centaurea stoebe ssp. micranthos
1350039 yellow starthistle Centaurea solstitialis collecting yellow starthistle biocontrol agents
1350073 spotted knapweed Centaurea stoebe ssp. micranthos releasing bioagents
1350076 knapweeds Centaurea spp. measuring knapweed height at a quantitative monitoring site

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