CLEARFIELD® RICE STEWARDSHIP...2009 Stewardship Rdi 1In-Season CLEARFIELD® Rice Production...
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CLEARFIELD® RICE STEWARDSHIP
Transcript of CLEARFIELD® RICE STEWARDSHIP...2009 Stewardship Rdi 1In-Season CLEARFIELD® Rice Production...
CLEARFIELD® RICE STEWARDSHIP
BIOLOGY OF OUTCROSSING
Maximum Outcrossing Rate and Genetic Compatibility betweenMaximum Outcrossing Rate and Genetic Compatibility between Red Rice (Oryzae sativa) Biotypes and Clearfield™ Rice
Vinod K. Shivrain, Nilda R. Burgos, David R. Gealey, Karen A.K. Moldenhauer, and Cecilia J. Baquireza
Weed Science 2008 56:807-813
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Maximum Outcrossing Rate and Genetic Compatibility between Red Rice (Oryzae sativa) Biotypes and Clearfield™ Rice
OBJECTIVE & METHODSOBJECTIVE & METHODS
Variability in maximum outcrossing rate between 12 red rice biotypes and Clearfield 161.
7 STRAWHULLS, 3 BLACKHULLS, 2 BROWNHULLS
Red rice biotypes planted in the middle row of nine row CL 161 plotsyp p p
The flowering duration of all red rice biotypes ranged from 5 to 16 days after the onset of flowering in contrast to 6 days for CL 161.
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Maximum Outcrossing Rate and Genetic Compatibility between Red Rice (Oryzae sativa) Biotypes and Clearfield™ Rice
RESULTSRESULTS
10 of 12 red rice biotypes had equal to or greater than 70% overlap in flowering with CL 161
The maximum field outcrossing rate between red rice biotypes and and CL 161 ranged from 0.03 to 0.25%.
CONCLUSION
Low outcrossing rate between cultivated rice and red rice because of genetic compatibilit floral morpholog & pollen prod ctionof genetic compatibility, floral morphology, & pollen production.
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Maximum Outcrossing Rate and Genetic Compatibility between Red Rice (Oryzae sativa) Biotypes and Clearfield™ Rice
Natural hybridization between rice and weedy rice occurs atNatural hybridization between rice and weedy rice occurs at relatively low frequencies because Oryzae is a primarily self-pollinated species (Khush 1997).
The outcrossing rate between cultivated rice and red rice is generally <1%, about 200 herbicide-resistant plants ha could still be produced after the first year of planting CL rice (Shivrain et al. p y p g (2007).
However, this varies widely due to the great diversity in red rice biot pes (Shi rain et al 2007)biotypes……. (Shivrain et al. 2007)
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Take Home Message – Clearfield rice acres increase the degree of outcrossing increases!!Take Home Message – Clearfield rice acres increase the degree of outcrossing increases!!
60% OF RICE ACRES COULD BE CLEARFIELD IN 2009!!60% OF RICE ACRES COULD BE CLEARFIELD IN 2009!!
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2009 Stewardship R d i2009 Stewardship R d iRecommendationsRecommendations
Sections
1. In Season CLEARFIELD® Rice Production
2 Crop Rotation Following Planting CLEARFIELD Rice2. Crop Rotation Following Planting CLEARFIELD Rice
3. Fields With Outcrossed Red Rice Plants
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2009 Stewardship R d i2009 Stewardship R d i
1 In-Season CLEARFIELD® Rice Production
RecommendationsRecommendations
Start clean – utilize a burndown herbicide at planting.
Introduces a different MOA
1. In-Season CLEARFIELD® Rice Production
Introduces a different MOA
Plant CLEARFIELD rice according to seed company recommendations for best cropping practices.
Good stand is more competitive
Apply a residual herbicide, such as Prowl® H20, Delayed Pre-emergence to increase grass controlemergence, to increase grass control.
May also give some residual control of red rice?
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2009 Stewardship R d i2009 Stewardship R d i
1 In-Season CLEARFIELD® Rice Production
RecommendationsRecommendations
Apply 2 applications of Newpath® herbicide as labeled. Do not skip 2nd application of Newpath. The 2nd application
1. In-Season CLEARFIELD® Rice Production
not skip 2 application of Newpath. The 2 application provides residual for extended weed control.
In the rare (hopefully) case you can not do this USE ( y) yBEYOND POSTFLOODWater management:
Flush within 2 days of first application.
Initiate permanent flood within 2 days of second application or as soon as the growth stage of the rice permits.
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Maintain good soil moisture until permanent flood.
2009 Stewardship R d i2009 Stewardship R d i
1 In-Season CLEARFIELD® Rice Production
RecommendationsRecommendations
Maintain weed-free levees and red rice free ditches and turn rows.
Treat with Beyond® herbicide to control escaped red rice at a
1. In-Season CLEARFIELD® Rice Production
y pproper growth stage according to Beyond label.
Don’t wait until red rice is headed!Rogue for red rice escapes.
Generally not practical, but if there is only one or two red rice plants remaining …………get your BIG BEHIND OUT OF THE TRUCK
DO NOT ratoon rice crop if red rice is present at harvest, regardless of plans to harvest or utilize as habitat.Roll and flush CLEARFIELD rice fields after harvest to promote germination
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of weeds in the fall.DO NOT till field in the fall. Unburied seed in the fall will have lower survival than seed buried by tillage.
APPLY BEYOND APPLY BEYOND APPLY BEYOND BEFORE FULL BOOTAPPLY BEYOND BEFORE FULL BOOTBEFORE FULL BOOTBEFORE FULL BOOT
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Skips and Misses
RETREAT WITH BEYOND TO PREVENT
Skips and Misses
RETREAT WITH BEYOND TO PREVENTRETREAT WITH BEYOND TO PREVENT SEED PRODUCTIONRETREAT WITH BEYOND TO PREVENT SEED PRODUCTION
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TOP 5 PRACTICES TO PREVENT OUTCROSSING
TOP 5 PRACTICES TO PREVENT OUTCROSSING
DO NOT PLANT CLEARFIELD RICE IN CONSECUTIVE YEARS IN THE SAME
PREVENT OUTCROSSINGPREVENT OUTCROSSING
FIELD
DO NOT PLANT CLEARFIELD RICE IN CONSECUTIVE YEARS IN THE SAME FIELDYEARS IN THE SAME FIELD
DO NOT PLANT CLEARFIELD RICE IN CONSECUTIVE YEARS IN THE SAME FIELDCO S CU S S
DO NOT PLANT CLEARFIELD RICE IN CONSECUTIVE YEARS IN THE SAME FIELDCONSECUTIVE YEARS IN THE SAME FIELD
DO NOT PLANT CLEARFIELD RICE IN
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CONSECUTIVE YEARS
Or, Your farm could end up LIKE Or, Your farm could end up LIKE THISTHISTHISTHIS
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2009 Stewardship R d i2009 Stewardship R d i
2 Crop Rotation Following Planting CLEARFIELD® Rice
RecommendationsRecommendations
DO NOT plant CLEARFIELD rice in consecutive years in the same field.
2. Crop Rotation Following Planting CLEARFIELD Rice
Rotate to another crop such as Roundup Ready® soybeans or corn and use alternate herbicide mode of action for red rice control.
I t ti l id l h bi id f d i dIn rotational crop use a residual herbicide for red rice and grass control, such as Outlook® or Dual Magnum® and Dual II Magnum®. DO NOT use an ALS herbicide as the primary residual herbicide.
In late germinating red rice is present in a Roundup Ready crop prior to canopy closure, an application of Roundup is recommended. A non-ALS herbicide should also be used to control red rice and other
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grasses in soybeans just prior to canopy closure.
2009 Stewardship R d i2009 Stewardship R d i
2 Crop Rotation Following Planting CLEARFIELD® Rice
RecommendationsRecommendations
DO NOT grow crawfish following CLEARFIELD rice (plant non-CLEARFIELD rice for use in crawfish fields).
2. Crop Rotation Following Planting CLEARFIELD Rice
DO NOT fallow fields following CLEARFIELD rice without repeated field tillage or glyphosate treatments to control volunteer red rice.
DO NOT ll d i t t d i i ThiDO NOT allow any red rice to go to seed in non-rice year. This includes any fallow or crawfish production fields.
When practical, cultivate all rotational crops regardless of herbicide program.
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Fallow field following CLEARFIELD® rice
DON’T LET THIS RICE GO TO SEED
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2009 Stewardship R d i2009 Stewardship R d i
3 Fields with Volunteer Rice With ALS Herbicide Tolerance
RecommendationsRecommendations
DO NOT PLANT RICE FOR AT LEAST TWO YEARS.
3. Fields with Volunteer Rice With ALS Herbicide Tolerance
DO NOT allow any rice to go to seed.
Plant an alternate crop such as Roundup Ready® soybeans or corn for two or more yearscorn, for two or more years.
Use a non-ALS herbicide, such as glyphosate, Outlook® or Dual® to control red rice or other ALS-resistant weeds.
Use cultivation to control red rice.
Rogue all suspect outcrossed plants to prevent seed
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Rogue all suspect outcrossed plants to prevent seed production.
Requirements: CLEARFIELD® Production System for RiceSystem for Rice
•Growers must sign a current planting year BASF CLEARFIELD Rice Stewardship Grower Agreement in order to purchase CLEARFIELD rice seed.
• Growers must purchase certified CLEARFIELD rice seed to produce a single commercial crop.
• When the grower uses an imidazolinone herbicide, the grower agrees to use Newpath® herbicide, Clearpath® herbicide, Beyond® herbicide, or other labeled BASF-branded or BASF-approved herbicide containingor other labeled BASF-branded or BASF-approved herbicide containing an imidazolinone in accordance with the product label.
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NO HERBICIDE SILVER BULLET ON THE HORIZON
If we don’t practice stewardship…….
Lose technology on individual farmsLose technology on individual farms
May lose technology for industry
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