while common ragweed often reaches 6 feet -- and giant ragweed can grow to 20 feet. While you can't use the plants' heights to distinguish them, you should be able to tell the difference between ...

Glyphosate-resistant biotypes of giant ragweed and common waterhemp have been confirmed within specific locations in Minnesota in 2007. Diversification with other herbicide modes of action via ...

What you see is not always what you think it is. This could be my mantra for nature. At this time of year, many people are suffering from fall allergies, often called seasonal allergies. The runny ...