Monday, October 21, 2013

Growth Spurts: Waterhemp Becoming a Superweed


Studying the first known case of waterhemp with resistance to HPPD-inhibiting herbicides such as Callisto, weed science researchers at the University of Illinois have identified two unique mechanisms in the plant that have allowed the weed to “get around” these herbicides.

“Waterhemp is very diverse, which you can see in the field. There are red plants, green plants, tall, short, bushy—basically a germplasm pool. If you  keep spraying the same herbicide over and over, eventually you’re going to find that rare plant that can resist it,” said Dean Riechers, a U of I Professor of weed physiology.

What the U of I researchers find alarming is that waterhemp resisted the herbicide in much the same way that corn naturally resists HPPD-inhibiting herbicides.

Continued in Growth Spurts

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