1. 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

2. Cadre (imazapic) BASF product labeled for peanut in 1996 postemergence –nutsedges –broadleaf –small grasses very popular –64% in GA $13-18/A rotation restrictions

3. Peanut Varieties and Cadre ReferenceVarieties Weed Tech. 1995 9:801-806Florunner, NC-V11 Peanut Sci. 1995 22:76-80Florunner, GA Runner, GK-7, NC-7, NC-V11, Southern Runner, Sunrunner, VC-1 Weed Tech. 1996 10:145-152Florunner, Southern Runner, Sunrunner Weed Sci. 1996 44:615-621Florunner, Southern Runner, NC-7 Weed Tech. 1997 11:714-719Florunner Peanut Sci. 1997 24:113-116Tamrun 88 Weed Tech. 1997 11:520-526Florunner, Southern Runner Weed Tech. 1999. 13:494-503NC-10 Peanut Sci. 2000 27:17-22Florunner Weed Tech. 2001 15:26-29AT-120, GK-7, NC-7, Tamspan 90

4. Georgia Green in Georgia Source: UGA Peanut Production Surveys

5. Peanut Stand Issues TSWV Florida MDR98 DP-1 GA-01R Do herbicides influence seed germination?

6. Objectives Influence of Cadre on Georgia Green…… – Yield – Seed size – germination

7. 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

8. Timing (DAP)Stage of Growth 8V2-V3 14V5 22V6 27R1 34R1-R2 41R2 47R3-R4 57R4-R5 Stages of Growth

9. 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 (32 0 F) for 18 days germination test at 77 0 F Seed stored at room temperature (20 days) Germination test at 68 0 F

10. Germination Tests Growth chamber Dark conditions Two constant temperatures –68 0 and 77 0 F –2 runs Petri dishes 2 layers of filter paper 10 seeds/dish 10 mls of tap water 7 days

11. Results

12. Georgia Green Yield Response to Cadre (1.44 ozs/A + Agrioil @ 1% v/v) P = 0.4515 CV = 11.21 PE-11-04 Attapulgus

13. Influence of Cadre on Georgia Green Seed Size (1.44 ozs/A + Agrioil @ 1% v/v) P = 0.0921 CV = 3.81 PE-11-04 Attapulgus

14. Influence of Cadre on Georgia Green Seed Germination (77 0 F- 7 days) (1.44 ozs/A + Agrioil @ 1% v/v) P = 0.08 CV = 5.68 PE-11-04 Attapulgus (average of 2 runs) 54 day old seed

15. Influence of Cadre on Georgia Green Seed Germination (68 0 F - 7 days) (1.44 ozs/A + Agrioil @ 1% v/v) P = 0.1689 CV = 9.2 PE-11-04 Attapulgus (average of 2 runs) 74 day old seed

16. Summary Cadre had no effect on ….. –Yield –Seed size – seed germination

17. 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

18. www.gaweed.com