Georgia Weeds: Prostrate Globe Amaranth and Sicklepod

Prostrate globe amaranth weed in cotton. Photo: Eric Prostko, University of Georgia

Prostrate globe amaranth weed in cotton. Photo: Eric Prostko, University of Georgia

A couple of things you might find of interest:

1. A local crop consultant recently sent me this picture of prostrate globe amaranth (Gomphrena celosioides).  I have never seen this plant before and for the record, Dr. Mark “The Czar” Czarnota (UGA-Griffin Campus) identified it for me. 

It is a member of the Amaranthaceae (pigweed) plant family.  For more general information about this weed, please refer to the following link: here.

Click Image to Enlarge

2. Had a peanut grower ask me if 2,4-DB applied to large sicklepod plants would have any effect on seed production.  A quick review of the literature would suggest that 2,4-DB applications made at the initial flower to peak flower stages of growth will cause significant reductions in the number of sicklepod seed produced. 

However, applications before or after that time have no effect on seed production (only initial flower and peak flower seed numbers were statisicially different than the NTC-none).

Click Image to Enlarge

Source URL: http://ugaweedscience.blogspot.com/2018/08/weed-science-update-august-21.html