The WSSA composite list of weeds includes 3756 plants (2847 unique species and 909 synonymic names) compiled by the Standardized Plant Names subcommittee.

Weed Images is a joint project of the University of Georgia’s Center for Invasive Species and Ecosystem Health and the Weed Science Society of America.

Weed impacts on crop yields

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Crop

Average yield loss without weed control

Economic loss to farmers without weed control (USD)

US

Canada

Year of economic loss estimate

Paper title

Authors

Publication Link

Sugar beet

72.2%

$1.25 billion

$25 million

2017

Potential yield loss in sugar beet due to weed interference in the United States and Canada.