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Russian knapweed (Rhaponticum repens)
https://pested.osu.edu/node/419
allelopathic. The problem is…Russian knapweed persists in cultivated fields when established and produces deep ...
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Wild parsnip (Pastinaca sativa)
https://pested.osu.edu/node/413
and in abandoned fields. Leaf: Alternate, pinnately compound, leaflets are oval to oblong, hairless ...
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Noxious Weeds
https://pested.osu.edu/EducatorResources/noxious-weeds
grass (Sorghum x almun) Cressleaf groundsel (Senecio glabellus) Field bindweed (Convolvulus arvensis) ...
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Palmer amaranth (Amaranthys palmeri)
https://pested.osu.edu/node/408
Habitat: Native grasslands, pastures, fields, disturbed areas, waste areas, open woods, meadows, and ...
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Mile-a-minute weed (Polygonum perfoliatum)
https://pested.osu.edu/node/406
wetlands, stream banks, roadsides and uncultivated open fields. Leaf: Alternate, waxy, light green colored ...
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Marestail (Conyza canadensis)
https://pested.osu.edu/node/405
orchards, fallow fields, waste areas and roadsides. Leaf: Mature plants have leaves that are entirely ...
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Russian thistle (Salsola Kali var. tenuifolia)
https://pested.osu.edu/node/411
Cultivated, fields, roadsides, railroad right-of ways, pastures, waste areas, irrigated areas, river bottoms, ...
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Poison hemlock (Conium maculatum)
https://pested.osu.edu/node/409
to most soils and is often found near roadsides. Field borders, hiking trails, railroad tracks, ...
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Musk thistle (Carduus nutans)
https://pested.osu.edu/node/407
waste places, ditch banks, old fields and old pastures. Leaf: Spiny dark green coarsely lobed leaves ...
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Canada Thistle (Cirsum arvense)
https://pested.osu.edu/node/397
roots Habitat: Grows in barrens, glades, meadows, fields, pastures, and waste places. It does best in ...