What are the World's Worst Weeds?
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Weed taxonomy
The most serious weeds
Important grass weeds
Important broad-leaved weeds

Out of the whole world flora only a very small fraction (fewer than 250 species) are regarded as major weeds. About 80 weed species are thought to be responsible for 90% of crop losses attributable to weeds.

The buttons to the left link to pages which provide information about the species that are regarded as the World's Worst Weeds.



A Mexican poppy (Argemone ochroleuca) seedling.

 

Steve Adkins