If you grow corn or soybeans in the Upper Midwest, you’ve probably battled giant ragweed. Now, a new survey published in the journal Weed Science offers insights into the distribution and management ...

WEST LAFAYETTE, Ind. — Giant ragweed soon could cast a giant shadow on the world's most popular herbicide. Researchers at Purdue and Ohio State universities have confirmed glyphosate-resistant giant ...

WEST LAFAYETTE, Ind. - Farmers who spot giant ragweed in their fields should apply a post-emergent herbicide before the infestation becomes unmanageable, even if no other weeds have appeared, two ...

Ambrosia - ah! Just the sound of the word is pleasing. Ragweed - ugh! The sound of that word makes us shudder. Ragweed is ambrosia, botanically speaking. Ambrosia is the name of a genus, or group of ...

From left: Felipe Faleco, University of Wisconsin-Madison, hands a bag of PPO-resistant giant ragweed seeds to Pat Tranel, University of Illinois Urbana-Champaign. The team identified the first cases ...

Q: My property has been invaded by giant weeds that can get 10 feet tall. Each of their big leaves are divided into three pointed lobes. I saw some of these last year and they produced seedy, ...

ISSAQUAH, Wash., May 5, 2026 /PRNewswire/ -- TerraClear, the leader in ag-tech integration, today announced the launch of a specialized Giant Ragweed Mapping Service. This high precision drone imagery ...

If you’ve had a runny nose, sneezing or other hay fever symptoms lately, you may be experiencing the curse of giant ragweed pollen. It’s a common allergy weed found in all the lower United States ...

If you struggle with seasonal allergies and hay fever, chances are the mere mention of ragweed can give you the sniffles. Not only is the native weed notorious for causing allergy symptoms, but there ...

Here’s my former student, Bill Stangler, standing next to a very tall plant that we found growing in great abundance on a big sandbar along our beautiful Congaree River, not too far from Columbia. Now ...

When giant ragweed takes hold in a crop field, the towering weed reduces yield and sends plumes of its famously allergy-inducing pollen into the air. There are few tools available to thwart the menace ...