Welcome to the University of Georgia Weed Science Homepage.
It is imperative that growers continue to use
sound herbicide programs but also
integrate these programs with other control
measures, such as hand-weeding, to remove
escapes before seed are produced, deep turning
to reduce the number of plants emerging (ideally
wait 3.5 to 4 years before repeating), and/or
using a heavy mulch cover crop to suppress
emergence in conservation tillage systems.
Palmer amaranth is a highly competitive weed of field corn, cotton, peanut, and soybean and has been confirmed to be
resistant to glyphosate in nearly every agronomic county in GA. Glyphosate-resistant (GR) Palmer
amaranth’s establishment and spread has been assisted by its rapid growth rate, extensive rooting structure, high seed
production, physical seed movement (man, animal, water), and most importantly by pollen (wind) dispersal.
Tropical spiderwort is a noxious, exotic, invasive
weed that can spread quickly. Upon initial
observation, tropical spiderwort appears to be a grass. While not a grass, it is a monocot (in
contrast to broadleaf weeds, which are dicots) with
leaves and stems usually fleshy and succulent. The
stems will creep along the ground and root at the
nodes. Vegetative cuttings from stems are capable
of rooting and reestablishing following cultivation.
Tropical spiderwort will produce seed above and
SWSS Weed Contest
The SWSS Weed Contest was hosted by the University of Georgia,
We are continually adding new information to our website.
This website may contain research results of use patterns of herbicides, some of which may not be currently registered for the particular use. Such results are included for informational purposes only and should not be taken as recommendations for use. Additionally, the University of Georgia does not guarantee nor warrant the standards of the products, nor do they imply approval of the products to the exclusion of others which may be similarly effective. Official University of Georgia weed control recommendations can be found in the latest edition of the Georgia Pest Control Handbook (Special Bulletin #28).