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A Natural Areas Inventory of the - Kansas Natural Heritage Inventory ...

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are in bloom. Fire has not been proven an effective control.<br />

Musk plumeless-thistle is not thought to be a major threat to native biodiversity at FLMR at this<br />

time. However, as it is <strong>of</strong>ficially designated as a noxious weed in <strong>Kansas</strong>, <strong>the</strong>re are requirements<br />

for its control. This species is generally associated with disturbed habitats (roadsides, abandoned<br />

fields, construction areas) and can become very abundant in areas grazed heavily by livestock. It<br />

also can appear during <strong>the</strong> early years <strong>of</strong> prairie restorations, but in successful restorations will<br />

generally not persist as a problem species. Extreme care must be exercised in controlling this<br />

species where it occurs within or near native communities so as not to damage non-target<br />

species.<br />

Cirsium vulgare (Asteraceae; bull thistle)<br />

Bull thistle is native to Europe, North Africa, and west Asia. It is now <strong>the</strong> most widespread and<br />

common rangeland and pasture thistle in western North America. It is a biennial, but sometimes<br />

annual or monocarpic, perennial forb and can grow to 2 m tall. It is found along roadsides and<br />

o<strong>the</strong>r disturbed areas, but will not tolerate shading in woodland settings. Key to successful<br />

management is <strong>the</strong> prevention <strong>of</strong> seed production. Monitoring efforts should be concentrated at<br />

<strong>the</strong> most disturbed areas and control should be centered on small areas <strong>of</strong> infestation so <strong>the</strong>y do<br />

not expand.<br />

Bull thistle is not thought to be a major threat to native biodiversity at FLMR at this time. This<br />

species is generally associated with disturbed habitats (roadsides, abandoned fields, construction<br />

areas) and can increase in areas grazed heavily by livestock. It also can appear during <strong>the</strong> early<br />

years <strong>of</strong> prairie restorations, but in successful restorations will generally not persist as a problem<br />

species. Extreme care must be exercised in controlling this species where it occurs within or<br />

near native communities so as not to damage non-target species.<br />

Convolvulus arvensis (Convolvulaceae; field bindweed)<br />

Field bindweed is native to Eurasia. It is a perennial vine <strong>of</strong> <strong>the</strong> morning-glory family that<br />

spreads by rhizomes and seeds. Seeds are extremely persistent and can remain viable in <strong>the</strong><br />

ground for many years. Seeds fall near <strong>the</strong> parent plant or can be transported by water and birds.<br />

It has been studied mainly as a crop pest and its impact on natural areas is less well known. It is<br />

found in a wide range <strong>of</strong> habitats but prefers strong sunlight and moderate to low moisture.<br />

Burning alone is not an effective control. Mowing is ineffective since it encourages a low<br />

growth form and plants can be missed. At sites previously used for agriculture, tilling may aid in<br />

controlling infestations. In small areas hand tools or application <strong>of</strong> herbicide with a backpack<br />

sprayer may be employed.<br />

Field bindweed is not thought to be a major threat to native biodiversity at FLMR at this time.<br />

However, as it is <strong>of</strong>ficially designated as a noxious weed in <strong>Kansas</strong>, <strong>the</strong>re are requirements for its<br />

control. This species is generally associated with disturbed habitats (lawns, roadsides,<br />

abandoned fields) and certain agricultural lands. Extreme care must be exercised in controlling<br />

this species where it occurs within or near native communities so as not to damage non-target<br />

species.<br />

NATURAL AREAS INVENTORY OF FT. LEAVENWORTH II 191

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