Field corn harvest is well underway in much of south Georgia. Please remind your growers that it is a great idea to think about managing weeds such as Palmer amaranth and Benghal dayflower at this time of year. Remember that Palmer amaranth seed is viable within ~2 weeks after pollen shed and Benghal dayflower can go from seed to seed in about 42 days. Thus, there is ample time to produce lots of seed in those harvested corn fields from now until first frost. Check out the UGA Pest Control Handbook (pages 74 and 86) for more specific information.
a) For growers who will not be planting a small grain this fall, here is one of my favorite post-harvest treatments. The rate for Gramoxone 3SL (paraquat) would be 32 oz/A. Tricor = metribuzin.
b) For those fields that are plagued by Benghal dayflower, splits shots (7-14 days apart) of either Gramoxone or 2,4-D.
