<![CDATA[Image RSS Feed for Image Collection 1428 - common ragweed (Ambrosia artemisiifolia) - Selected Images only]]> http://www.ipmimages.org/collections/viewcollection.cfm?id=1428 Appearance

Ambrosia artemisiifolia is an annual. It blooms in the late summer and it can grow up to 4 ft. (1.2 m) tall.

Foliage

Stems and leaves are blue-green and covered with fine hairs. Leaves divided and bottom sides covered in fine hairs, giving a gray appearance.

Flowers

Flowers inconspicuous, yellowish-white, and found on terminal branches.

Fruit

Fruits are yellowish to reddish brown, woody, spined, ridged, and crow like in appearance. Seeds are 0.12-0.16 in. (3-4 mm) long.

Ecological Threat

This plant is common throughout the United States and causes hay fever in many people. It is commonly found along ditches and waste areas. It is not highly competitive in crops or rangeland. Native to all U.S. states except Hawaii and Alaska.

Herbicide Resistance

Populations of this plant exist in the United States that are resistant to ALS inhibitors (B/2),Photosystem II inhibitors (C1/5), PPO inhibitors (E/14), Glycines (G/9)]]> Thu, 28 Mar 2024 20:22:05 -0400 Thu, 28 Mar 2024 20:22:05 -0400 http://Images.bugwood.org/ <![CDATA[common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1120007 common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1120007 <![CDATA[common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1391466 common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1391466 <![CDATA[common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1391510 common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1391510 <![CDATA[common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1120008 common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1120008 <![CDATA[common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1120009 common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1120009 <![CDATA[common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1459919 common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1459919 <![CDATA[common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1459512 common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1459512 <![CDATA[common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1559044 common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=1559044 <![CDATA[common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5436879 common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5436879 <![CDATA[common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5436890 common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5436890 <![CDATA[common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5436880 common ragweed Ambrosia artemisiifolia]]> http://www.ipmimages.org/browse/detail.cfm?imgnum=5436880