influence of cadre on georgia green yield and seed germination
DESCRIPTION
Influence of Cadre on Georgia Green Yield and Seed Germination. Eric P. Prostko and Tim L. Grey Department of Crop & Soil Sciences University of Georgia. APRES 2005. Cadre (imazapic). BASF product labeled for peanut in 1996 postemergence nutsedges broadleaf small grasses very popular - PowerPoint PPT PresentationTRANSCRIPT
Influence of Cadre on Georgia Green Yield and Seed Germination
Eric P. Prostko and Tim L. GreyDepartment of Crop & Soil SciencesUniversity of Georgia
APRES 2005
Cadre (imazapic)
• BASF product• labeled for peanut in
1996• postemergence
– nutsedges– broadleaf– small grasses
• very popular– 64% in GA
• $13-18/A• rotation restrictions
Peanut Varieties and CadreReference Varieties
Weed Tech. 1995 9:801-806 Florunner, NC-V11
Peanut Sci. 1995 22:76-80 Florunner, GA Runner, GK-7, NC-7, NC-V11, Southern Runner, Sunrunner, VC-1
Weed Tech. 1996 10:145-152 Florunner, Southern Runner, Sunrunner
Weed Sci. 1996 44:615-621 Florunner, Southern Runner, NC-7
Weed Tech. 1997 11:714-719 Florunner
Peanut Sci. 1997 24:113-116 Tamrun 88
Weed Tech. 1997 11:520-526 Florunner, Southern Runner
Weed Tech. 1999. 13:494-503 NC-10
Peanut Sci. 2000 27:17-22 Florunner
Weed Tech. 2001 15:26-29 AT-120, GK-7, NC-7, Tamspan 90
Georgia Green in Georgia
30
89 90 88
0
20
40
60
80
100
1997 1999 2001 2003
Year
Acr
es P
lant
ed -
%
Source: UGA Peanut Production Surveys
Peanut Stand Issues
• TSWV
• Florida MDR98
• DP-1
• GA-01R
• Do herbicides influence seed germination?
Objectives
• Influence of Cadre on Georgia Green……
– Yield
– Seed size
– germination
Materials and Methods
• Small plot techniques (4 reps)
• Planting date: May 13, 2004
• twin rows
• Cadre @ 1.44 ozs/A + Agrioil @ 1% v/v– 8, 14, 22, 27, 34, 41, 47, 57 DAP
• Weed-free conditions– Strongarm + Prowl– hand-weeded
• 1000 lbs/A Gypsum on June 23, 2004
Timing (DAP) Stage of Growth
8 V2-V3
14 V5
22 V6
27 R1
34 R1-R2
41 R2
47 R3-R4
57 R4-R5
Stages of Growth
Seed Collection
• 100 pods after digging but before combine• Stored at room temperature for 36 days• hand-shelled• weight of 100 seed• placed in cold storage (320F) for 18 days• germination test at 770F• Seed stored at room temperature (20
days)• Germination test at 680F
Germination Tests
• Growth chamber• Dark conditions• Two constant temperatures
– 680 and 770 F– 2 runs
• Petri dishes• 2 layers of filter paper• 10 seeds/dish• 10 mls of tap water• 7 days
Results
Georgia Green Yield Response to Cadre(1.44 ozs/A + Agrioil @ 1% v/v)
48285016
47335065
44514619
5301
48345205
0
1000
2000
3000
4000
5000
6000
Untreat
ed
8 DAP
14 D
AP
22 D
AP
27 D
AP
34 D
AP
41 D
AP
47 D
AP
56 D
AP
Timing
lbs/
A
P = 0.4515CV = 11.21
PE-11-04Attapulgus
Influence of Cadre on Georgia Green Seed Size(1.44 ozs/A + Agrioil @ 1% v/v)
5861
57 59 57 56 57 58 58
0
15
30
45
60
75
Untreat
ed
8 DAP
14 D
AP
22 D
AP
27 D
AP
34 D
AP
41 D
AP
47 D
AP
56 D
AP
Timing
g/10
0 se
ed
P = 0.0921CV = 3.81
PE-11-04Attapulgus
Influence of Cadre on Georgia Green Seed Germination (770F- 7 days)
(1.44 ozs/A + Agrioil @ 1% v/v)
9487
9097
9399
9298
94
0
20
40
60
80
100
Untreat
ed
8 DAP
14 D
AP
22 D
AP
27 D
AP
34 D
AP
41 D
AP
47 D
AP
56 D
AP
Timing
% (
7 da
ys)
P = 0.08CV = 5.68
PE-11-04Attapulgus(average of 2 runs)54 day old seed
Influence of Cadre on Georgia Green Seed Germination (680F - 7 days)
(1.44 ozs/A + Agrioil @ 1% v/v)
8488
83
96
78
88 89 89
78
0
20
40
60
80
100
Untreat
ed
8 DAP
14 D
AP
22 D
AP
27 D
AP
34 D
AP
41 D
AP
47 D
AP
56 D
AP
Timing
% (
7 da
ys)
P = 0.1689CV = 9.2
PE-11-04Attapulgus(average of 2 runs)74 day old seed
Summary
• Cadre had no effect on …..– Yield– Seed size– seed
germination
2005 Research
• Cadre @ 1.44 ozs/A + COC @ 1% v/v
– 30 and 45 DAP
• 2,4-DB @ 1.1 pts/A + COC @ 1% v/v
– 75 and 95 DAP
• 3 peanut varieties
– GA Green, C99-R, GA – 01R
• 2 locations in Georgia
• National Peanut Board Funding
www.gaweed.com