Weed Management Practices Utilized by “Top” Peanut
Producers in Georgia (2005-2006)
E. P. Prostko and J.P. BeasleyThe University of Georgia
Cooperative ExtensionWSSA-2008
1,230,000 acres planted in US43.1% in GA
Peanut Weed Problems in GeorgiaTop 10 Most Troublesome Weeds (1-5)
SWSS
SWSS
1 23
4
5
5
Peanut Weed Problems in GeorgiaTop 10 Most Troublesome Weeds (6-10)
SWSS
SWSS
6 7 8
9 10
Fungicides are applied 4-7 times/year.Fungicides are applied 4-7 times/year.
Will Duffie, 2006
Peanut Harvesting (2 step process)Digging/Inverting
Peanut Harvesting (2 step process)Combining
Georgia Peanut Achievement Club
• UGA Cooperative Extension
• Syngenta
• Since 1950
• Educational/recreational program to recognize top peanut growers in the state.
• Also known as…… One Ton Per Acre
Peanut Club Peanut Money
Maker Club
Information Obtained from Growers
• Acres/yield• Rotation• Varieties• Row pattern• Seeding rate• Planting date• Nematodes• Thrips• Soil/Foliar insects• Tillage• Weed control• Fungicides• Irrigation
Georgia Peanut Achievement Club
Year
Growers (#)
Total Peanut Acres
Average Peanut Acres
2005 21 10,279 490
2006 12 5,593 466
How good are these growers?Peanut Yields
4356
5109
2840 27502989 2874
0
1000
2000
3000
4000
5000
6000
2005 2006
Year
Yie
ld (
lbs/
A)
PAC GA US
+1516 +2359+1367 +2235
Tillage Methods
• Conventional 2005 – 91% 2006 – 92%
• Strip-Tillage 2005 – 9% 2006 – 8%
• Associated Problems weed shifts reduced
performance of DNA herbicides
Tropical spiderwort(Bengal dayflower)
Palmer Amaranth
Row Patterns
• Single Row 2005 – 33% 2006 - 8%
• Twin Row 2005 – 67% 2006 – 92%
• Why?? 10-15% increase in weed
control associated with row patterns
300-500 lb/A yield increases
1-2% increase in grade ($10/ton)
Reductions in TSWV
Single Row Twin Row
Ethalfluralin (Sonalan) or Pendimethalin (Prowl)
• 2005 Sonalan – 86% Prowl – 10%
• 2006 Sonalan – 83% Prowl – 8%
Other Herbicides Used - %Common name
Trade Name 2005 2006
bentazon Basagran 10 17
bentazon + acifluorfen
Storm 10 25
chlorimuron Classic 5 0
clethodim/
sethoxydim
Select/Poast 5 8
diclosulam Strongarm 38 58
flumioxazin Valor 38 50
imazapic Cadre 76 75
metolachlor Dual Magnum
14 25
paraquat Gramoxone 24 25
2,4-DB Butoxone 52 58
How do the “top” peanut growers in Georgia manage weeds?
• conventional tillage
• twin-rows
• ethalfluralin (Sonalan)
• diclosulam (Strongarm) and/or flumioxazin (Valor)
• imazapic (Cadre/Impose)
• 2,4-DB (Butyrac/Butoxone)
www.gaweed.com