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Ohio State University Extension

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  1. common ragweed (SOA 2R)

    https://herbselector.osu.edu/weeds/common-ragweed-soa-2r

    Leaves mostly opposite; Stem, petioles, and leaves hairy, Stem shorter than giant ragweed, monoecious flowers ...

  2. giant ragweed

    https://herbselector.osu.edu/weeds/giant-ragweed

    Leaf margins entire to 3 to 7 lobes; leaves mostly oppoiste; stems very tall (up to 13 feet); Monoecious flowers ...

  3. giant ragweed (SOA 2R)

    https://herbselector.osu.edu/weeds/giant-ragweed-soa-2r

    Leaf margins entire to 3 to 7 lobes; leaves mostly oppoiste; stems very tall (up to 13 feet); Monoecious flowers ...

  4. jimsonweed

    https://herbselector.osu.edu/weeds/jimsonweed

    Entire (early) to somewhat deep and sharply lobed leaves with very bad smell; Fruit: hard, spiny capsule ...

  5. redroot pigweed

    https://herbselector.osu.edu/weeds/redroot-pigweed

    ...

  6. smartweed

    https://herbselector.osu.edu/weeds/smartweed

    ...

  7. velvetleaf

    https://herbselector.osu.edu/weeds/velvetleaf

    ...

  8. waterhemp (SOA 2+9R)

    https://herbselector.osu.edu/weeds/waterhemp-soa-29r

    ...

  9. barnyardgrass

    https://herbselector.osu.edu/weeds/barnyardgrass

    No Ligule; Very smooth to the touch ...

  10. crabgrass

    https://herbselector.osu.edu/weeds/crabgrass

    Long hairs on sheath, held at 90-degree angle from sheath, and hairs on the leaf blade; Average Ligule; Plant somewhat prostrate and rooting at nodes ...

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