Rice Weed Management. Eric Webster

Transcription

1 Rice Weed Management Eric Webster

2 Newpath Timing and Rates

3 Newpath Timing and Rates Drill-seeded CL 131 and 161 Initial timing at 0, 1, 2, 3, 4 WAE followed by second 2 weeks later Newpath at 4 oz/a fb 4 oz/a ($32.80/A) Newpath at 4 oz/a fb 6 oz/a ($41/A) Newpath at 6 oz/a fb 4 oz/a ($41/A) Newpath at 6 oz/a fb 6 oz/a ($49.20/A) COC at 1% v/v ($4.50/A), 2 applications Economics on timing and rate

4 Economics of Newpath Timing

5 Red Rice and Barnyardgrass Control with Different Newpath Application Timings ORYSA ECHCG 0 Emerge 1 WAE 2 WAE 3 WAE 4 WAE Weeks After Emergence

6 4500 Yield from Rice Treated with Different Newpath Application Timings Yield (Lb/A) Emerge 1 WAE 2 WAE 3 WAE 4 WAE Weeks After Emergence

7 600 Net Returns Above Herbicide Cost with Different Newpath Application Timings $ - 190/A $ 240/A $ 200/A 200 $ 310/A Emerge 1 WAE 2 WAE 3 WAE 4 WAE Weeks After Emergence

8 Economics of Newpath Rate

9 Yield from Rice Treated with Different Newpath Rates Yield (Lb/A) fb 6 4 fb 4 6 fb 4 4 fb 6 Newpath Rate oz/a

10 Net Returns above Herbicide Cost with Different Newpath Application Rates Profit above herbicide Cost $ - 70/A $ - 75/A $ - 75/A 0 6 fb 6 4 fb 4 6 fb 4 4 fb 6 Newpath Rate oz/a

11 Summary Red rice and barnyardgrass control doubled with Newpath applied at emergence As initial application of Newpath was delayed, yield decreased Net returns over herbicide cost decreased $190 to $310/A as initial application Newpath was delayed Yield increased with 6 oz followed by 6 oz application rates of Newpath compared with treatments with at least one 4 oz application Net returns over herbicide cost decreased $70 to $75/A when using 4 oz of Newpath in at least one application Be aggressive do not wait to apply herbicide

12 Newpath plus Propanil Combinations at Different Application Timings

13 Newpath Plus Propanil Combinations Drill-seeded CL 131 and 161 Newpath at 4 oz/a ($16.40/A), 2 times, ($32.80/A) Various propanil formulations at 3 qt/a Stam M4 ($18.75/A); Stam SC ($27.75/A); RiceShot ($22.50/A); SuperWham ($24.75/A); Stam EDF ($45/A) COC at 1% v/v ($2.25/A) added to Newpath alone, Stam SC, SuperWham, and Stam EDF

14 Red Rice Control with Newpath plus Propanil Formulations 100 % Control (35 DAFT) EPOST LPOST No Propanil Stam M4 Stam SC RiceShot SuperWham Stam EDF

15 Yield from Rice Treated with Newpath plus Propanil Combinations lb/a EPOST LPOST No Propanil Stam M4 Stam SC RiceShot SuperWham Stam EDF

16 Net Returns over Herbicide Cost on Clearfield Rice $/A 64% 71% EPOST LPOST 56% 42% 49% % 22% 29% 11% 18% 13% No Propanil Stam M4 Stam SC RiceShot SuperWham Stam EDF

17 Summary The addition of propanil to Newpath increases control of red rice Yield increased 1300 to 2650 lb/a with the addition of propanil EPOST Yield increased 650 to 1600 lb/a with the addition of propanil LPOST Net returns over herbicide cost increased 29 to 71% with the addition of propanil EPOST Net returns over herbicide cost increased 11 to 42% with the addition of propanil LPOST Saving herbicide cost may reduce overall profits Propanil, dance with the one that brought you

18 RiceBeaux Synergizes Newpath

19 RiceBeaux Synergizes Newpath on Red Rice Drill-seeded CL 131 Newpath at 1, 2, and 4 oz/a EPOST RiceBeaux at 0 and 2.5 qt/a EPOST Newpath at 6 oz/a LPOST RRS-South Farm Four replications

20 Newpath 4 oz/a EPOST fb Newpath 6 oz/a LPOST

21 Newpath 4 oz + RiceBeaux 2.5 qt EPOST fb Newpath 6 oz LPOST

22 Newpath 4 oz + RiceBeaux 2.5 qt EPOST fb Newpath 6 oz LPOST RiceBeaux 2.5 qt EPOST fb Newpath 6 oz LPOST

23 Preservation of Clearfield Rice

24 Four Year Field Layout 0.5 Acre Blocks 09 - Soybean 10 - CL Rice 11 - Soybean 12 - CL Rice 09 - Soybean 10 - Soybean 11 - Soybean 12 - CL Rice 09 - Fallow 10 - Fallow 11 - Soybean 12 - CL Rice 09 - Fallow 10 - CL Rice 11 - Soybean 12 - CL Rice

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29 Summary One year rotation not enough Two year rotation will be monitored in 2011 Large scale red rice/clearfield out-crossing cannot be allowed Must be diligent at monitoring hybrid Rice followed by rice should never occur; regardless of cultivar or hybrid

30 Other Research Ammonium sulfate and AMS substitutes Clearfield rice tolerance to other ALS herbicides Competition and late season control of hemp sesbania and Indian jointvetch Start Clearfield preservation studies on south farm

31 Changes for 2011 Beyond 2 applications up to 6 oz/a First Beyond application must follow Newpath, do not skip the Newpath Permit Plus halosulfuron plus thifensulfuron FMC will probably have a Command plus quinclorac pre-mix

32 Questions