Welcome to the University of Georgia Weed Science Homepage.

The weed science faculty and staff are committed to providing the information and resources you need to answer your weed control questions.

UGA Weed Control Programs for Watermelon in 2014

New herbicidal tools are being developed to assist growers in the battle against weeds in watermelon. These tools are a result of cooperative efforts involving The University of Georgia, IR-4, The Georgia Department of Agriculture, The Georgia Agricultural Commission for Vegetables, and Industry. This circular is an effort to provide effective weed management programs for seeded and transplant watermelon.

Read about watermelon weed control programs . . .

Rolling Rye For Conservation Tillage Cotton Success

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UGA Programs for Controlling Palmer Amaranth in 2014 Cotton

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.

These integrated programs proved to be very successful during 2012. Continued efforts are underway to further improve management programs while becoming more economical.

The Biology and Ecology of Palmer Amaranth: Implications for Control

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.

Growers must understand the biology and ecology of GR Palmer amaranth if effective control is to be achieved.

University of Georgia Herbicide Programs for Tropical Spiderwort Control in 2013 Cotton

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 below ground.

SWSS Weed Contest

The SWSS Weed Contest was hosted by the University of Georgia,
August 4-5, 2009 at the UGA Tifton Campus Conference Center.


We are continually adding new information to our website.

If there are additional topics or resources that are of interest to you, please describing what you are looking for.



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).