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  WESTMINSTER, Colorado – September 9, 2021 – Weedy rice (Oryza spp.) is a serious threat to rice crops around the globe. It can rob them of vital nutrients and cause yield losses of up to 90 percent – creating … more »

Buffelgrass is a drought-tolerant, invasive weed that threatens the biodiversity of native ecosystems in the drylands of the Americas and Australia. Unfortunately, though, land managers trying to control the weed often experience mixed results. more »

When it comes to weed control, today’s growers face a double whammy. Weeds have developed resistance to many of our existing herbicide options at a time when new herbicide discoveries have plummeted. But a recent study featured in the journal Weed Science shows one often overlooked weed control strategy may help to fill the void. more »

Kochia has become one of the most problematic weeds in the U.S. – now resistant to at least four herbicide sites of action. And researchers writing in the journal Weed Technology say sugarbeet growers in particular have cause for concern. more »

Palmer amaranth and waterhemp are two troublesome amaranthus species weeds that are resistant to multiple herbicides. They also have unique reproductive features. more »

Sobering global survey data shows weeds have evolved resistance to 167 herbicides spanning 23 of 26 known sites of action. Now scientists writing in the journal Invasive Plant Science and Management say climate change and elevated levels of carbon dioxide (CO2) may be contributing to the development of herbicide resistance. more »

As invasive shrubs become more prevalent in U.S. forests, they are creating dense understories that outcompete native plants. Land managers with limited resources find themselves facing a tough decision. Does it make sense to remove the invaders if a comprehensive restoration program isn’t possible? more »

Herbicide resistance is a costly and growing problem. In fact, many weed populations now exhibit resistance to multiple herbicide mechanisms of action. more »