Green Quiz: Superweeds

4478664134_d8491bd93a_z
Photo: Global Water Partnership

 

When Monsanto introduced pesticide resistant seeds ("Roundup Ready") in the 1990s, farmers weren't prepared for the growth in "superweeds" that also developed resistance to the pesticide. Now, superweeds are pervasive on American farms. How many acres of farmland have superweeds invaded in the US?

A) 5 million acres

B) 25 million acres

C) 48 million acres

D) 60 million acres

 

The correct answer is D) 60 million acres. According to the Union of Concerned Scientists, weed species began evolving resistance to glyphosate, the active ingredient in Roundup, in the United States within five years of introduction. Fifty percent of U.S. farmers surveyed report glyphosate-resistant weed infestations. In the Southeast, more than 90 percent of cotton and soybean farmers are affected.  

Comments

Feed You can follow this conversation by subscribing to the comment feed for this post.

Post a comment

Comments are moderated, and will not appear on this weblog until the author has approved them.

If you have a TypeKey or TypePad account, please Sign In.

EARTH SAVING NEWS