The Science Seminar Series: Septemeber 4, 2008

Benghal dayflower: Tales of an exotic invasive weed in the Southeast US.

Theodore M. Webster, Crop Protection and Management Research Unit

USDA-Agricultural Research Service

Tifton, GA.

Place: Powell Hall
Time: 4:00 -5:00pm

Abstract:

A native of tropical Asia and Africa, Benghal dayflower (Commelina benghalensis, also known as tropical spiderwort) was first introduced to the US in the late 1920’s and first identified in Georgia in 1967. With the introduction and use of glyphosate (Roundup) tolerant crops, Benghal dayflower has become a significant weed of cotton, peanut, soybean, and corn. Benghal dayflower is also listed on the Federal Noxious Weed List, which prohibits movement of this plant (or its parts) across state boundaries. This is a significant issue for states in the Southeast US with turf and container nursery ornamental production and has had serious ramifications for one nursery in South Carolina. One of the most unique aspects to this weed is the presence of both aerial and subterranean flowers, one of only several dozen species to have such capabilities. Research on the biology and ecology of Benghal dayflower in agroecosystems will be reviewed, as well as research on the potential distribution of this species throughout the world.