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01
Jul
2013
Rice Research Verification Program Post-flood Update – June 24, 2013
Author: Arkansas Row Crops

North Arkansas:  Cool, wet and windy conditions plagued much of the planting and early growing season this year.  As usual, Arkansas rice growers were able to persevere and get the rice crop in.  All of the northern RRVP fields have established or are in the process of establishing the permanent flood.  RRVP fields have really begun to look good at this point and have benefitted from the warmer temperatures the state has been receiving.  N-star nitrogen recommendations were utilized on all but one of the fields which had excessive flooding all spring.    Some significant rice water weevil populations have been observed and treatments were applied to control them.  According to the DD-50’s, mid-season nitrogen applications should be going out in the next few days on a few fields.

South Arkansas:  After a rocky start in April and May the hot weather and heat units has the rice moving along very well.  Most all the southern fields are at panicle initiation to fast approaching ½ inch internode elongation. Three of the late fields are still in the late tillering stage. The Jefferson County water seeded field incurred some rice water weevil scarring and was treated.  No sheath blight or blast has been detected in the fields so far.  Rice stink bugs are lurking in grass around some fields and turn rows are now being clipped.  N-star nitrogen recommendations were utilized on all of the fields.  Mid-season nitrogen applications have gone out on two fields with more going out in the next week.

County

Variety

Seeding:

Date

Method

Rate

Treatment

Emergence

Density

Stage

General Rice Information & Applications (Rates listed are per acre)

North Arkansas
Clay

RT CL XL745

May 23

Drill-seeded

23 lb/Ac

RiceTec

May 31

8 plants/ft

Early Tillering

Applied 12.8 oz/A Command + 0.5 lbs/A Clearpath + 1% COC early postemergence on 6/7.  Recommended the N-star preflood rate of 210 lbs/A urea/NBPT preflood and then establish permanent flood with multiple-inlet rice irrigation.  Field has received 3.7” of rain since planting.  Weed control was good and will be evaluated for Beyond herbicide application postflood.
Conway

RT XL753

May 11

Drill-seeded

23 lb/Ac

RiceTec

May 20

7 plants/ft2

Late Tillering

Applied 12.8 oz/A Command + 0.5 lbs/A Facet DF + 0.67 oz/A Permit preemergence on 5/18.  N-star recommendation of 220 lbs/A of urea/NBPT applied 6/19 and permanent flood established.  Field has received 4.5” of rain since planting.  Stand establishment was hampered from a cloddy seedbed and dry and windy conditions.  Weed control was good, but amazon sprangletop will need to be evaluated for postflood treatment.
Cross

Francis

May 15

Drill-seeded

91 lb/Ac

ApronMaxx

May 26

30 plants/ft2

Early Tillering

Applied 20 oz/A Command preemergence on 5/15 and followed up with 0.5 lbs/A Facet DF + 0.67 pts/A Grandstand + 1 oz/A Aim + 1% COC late postemergence on 6/14.  Recommended 290 lbs/A urea preflood and establishment of permanent flood.  Field has received 4.4” of rain since planting.  Leaf burn on rice was very evident following late postemergence application, but quickly outgrew the symptoms.
Independence

Roy J

April 22

Drill-seeded

80 lb/Ac

ApronMaxx+ Release

May 8

26 Plants/ft2

Late Tillering

Applied 12.8 oz/A Command preemergence on 4/24 and followed up with 1 gal/A Stam M4 + 2 pts/A Prowl H2O late postemergence on 6/7.  Applied N-star single preflood rate of 150 lbs/A urea/NBPT on 6/13.  Permanent flood was started 6/14 using multiple-inlet rice irrigation and completed in two days.  Field has received 11.4” of rain since planting.  Windy and rainy conditions hampered herbicide and fertilizer applications; therefore, the permanent flood was delayed in establishment.  Field color though not dark green looks healthy and expect minimal disease pressure.  Expect panicle initiation in the next few days.
Jackson

Roy J

May 2

Drill-seeded

75 lb/Ac

CruiserMaxx

May 13

36 plants/ft2

Late Tillering

No preemergence application was applied due to recent land-leveling and soil texture.  A mid-postemergence application of 5 qts/A Stam M4 + 0.33 lbs/A Facet was applied on 5/26.  Weed control was good prior to flood.  The N-star preflood rate of 220 lbs/A of urea/NBPT was applied 6/15.  The permanent flood was started on 6/16.  The field has received 10.15” of rain since planting.  Mild sulfur deficiency was detected after flood establishment and 100 lbs/A of ammonium sulfate was recommended to correct it this week.
Lawrence

CL111

May 18

Drill-seeded

80 lb/Ac

CruiserMaxx

May 26

16 plants/ft2

Late Tillering

Applied 0.5 lbs/A Clearpath + 1 pt/A COC early postemergence on 6/5.  Broadleaf weed control was good, but large barnyardgrass densities and coverage issues warranted a second application of 6 oz/A Newpath + 1 pt/A COC on 6/15.  The N-star preflood recommendation of 250 lbs/A of urea/NBPT was applied 6/15 and the permanent flood was started on 6/16 using multiple inlet rice irrigation.  The field has received 5.21” of rain since planting.  Predict panicle initiation next week.
Poinsett

Jupiter

April 22

78 lb/Ac

CruiserMaxx

May 7

24 plants/ft2

Late Tillering

Applied 12.8 oz/A Command preemergence on 4/24.  Due to rainy and windy conditions and a delayed permanent flood establishment, large grass weeds developed and 0.5 oz/A Regiment + 32 oz/A Facet L + 0.75 oz/A Permit Plus + 1% Triple Play adjuvant was applied late postemergence on 6/5.  The N-star preflood rate of 260 lbs/A of urea/NBPT was applied 6/12.  Permanent flood establishment began 6/13 and was completed in half the time using multiple inlet rice irrigation.  The field has received 12.81” of rain since planting.  Panicle initiation is expected 6/27.
Prairie

Roy J

April 22

115 lb/Ac

None

Pegged 5/9

26 plants/ft2

Panicle  Initiation

Applied 1 gal/A Duet + 0.25 oz/A Londax + 1 qt/A RiceShot mid-postemergence on 5/25.  To control the escaped fall panicum, 15 oz/A Clincher + 1 qt/A COC was applied postflood on 6/15.  After the rice pegged, the flood was established and couldn’t be brought down due to continuous flooding in the area.  Fertilizer applications included 100 lbs/A of urea at the 3-4 lf stage, 100 lbs/A urea + 100 lbs/A DAP at the tillering stage.  150 lbs/A urea was recommended for midseason.  The field has had challenges due to flooding, but looks to have come through them.  Will begin scouting for sheath blight this week.
Randolph

RT CL XL745

May 13

21 lb/Ac

RiceTec

May 28

7 plants/ft2

Late Tillering

Applied 4 oz/A Newpath + 22 oz/A Facet L + 3 qts/A Stam M4 late postemergence on 6/17.  Applied 300 lbs/A of 41-0-0-4 according to the N-star preflood recommendation on 6/17.  The field was flooded in 4 days starting 6/18 and has received 3.17” of rain since planting.  The rice was submerged from floodwater for approximately 4 days the first week of June and a few levees were washed out.  The rice plants were stretched and bent over, but recuperated following warm temperatures and sunlight.  Panicle initiation is predicted for next week.
White

Roy J

April 24

73 lb/Ac

Release

May 9

24 plants/ft2

Late tillering

Applied 1 qt/A Roundup Ultra + 16 oz/A Command preemergence on 4/25.  On 6/5, a late postemergence application of 1 gal/A Riceshot + 2 pts/A Bolero + 0.5 oz/A Permit were applied to control escaping grasses, broadleaves, and yellow nutsedge.  The N-star preflood nitrogen recommendation of 220 lbs/A of urea was applied on 6/5.  The permanent flood was established on 6/10.  The field has received 11.33” of rain since planting.  Rice water weevil leaf scarring was observed above threshold levels and sprayed with 3.5 oz/A Mustang Max on 6/20 and control was good.  Predicted panicle initiation is expected in the next few days.
Yell

Roy J

May 15

82 lb/Ac

ApronMaxx

May 26

29 plants/ft2

Early Tillering

Applied 30 oz/A of Obey preemergence on 5/18 and followed up on 6/18 with a mid-postemergence application of 5 oz/A Broadhead + 3 qts/A Stam M4 for a heavy infestation of pigweeds.  250 lbs/A of urea was recommended preflood according to the N-star recommendation.  The permanent flood has not been established yet.  The field has received 4.89” of rain since planting.
South Arkansas
Arkansas 1        

CL XL 745

April 22

Drill-Seeded

20 lbs/acre

RiceTec

May 6

6.3Plants/ft2

Panicle Initiation

The field received Newpath herbicide (6 oz/acre) early post emergence followed by Clearpath (.5 lb/acre).  Ammonium Sulfate (100 lbs/acre) was applied.  Due to the high wind there was a two week delay in Clearpath application.  Broadleaf signalgrass was past 4 leaf stage.  Recommended N-star preflood rate of (135 lbs Urea/NBPT).
Arkansas 2

Roy J

April 29

Drill-Seeded

74 lbs/acre

ApronMaxx/Zinc

May 13

15 plants/ft2

Panicle Initiation

Command (12.8 oz/acre) and League (3.2 oz/acre) herbicides were applied as a preemergence followed by Superwham (3 qts/acre) plus Facet L (32 oz/acre) plus League (3.2 oz/acre) plus crop oil (1 pt/acre).  The field is clean considering the year and it being a conventional variety.  The Preflood N-star rate required (195 lbs Urea/NBPT).  The field is on schedule with the DD-50.
Arkansas 3

CL 151

April 26

Drill-Seeded

72 lbs/acre

Cruiser Maxx

May 8

15 plants /ft2

½ inch internode elongation

Command was applied at (12.8 oz/acre) as a premergence herbicide.  Newpath (4oz/acre) followed by Clearpath (.5 lb/acre) plus Permit (1oz/acre) plus crop oil (1%). The preflood N-star rate was (250 lbs Urea/NBPT).  Mid-season urea fertilizer (100 lbs/acre) has been applied.  The field is clean and on schedule with DD-50.
Chicot 1

CL 152

May 12

Drill Seeded

60 lbs/acre

Cruiser Maxx

May 20

20 plants ft2

Late

Tillering

Command herbicide (12.8 oz) was applied as a preemergence. Newpath (4 oz/acre) was applied postemergence followed by Clearpath (.5 lb/acre) plus League (6.4 oz/acre) plus crop oil (1qt/acre). Ammonium sulfate (100 lbs/acre) was applied at 2-3 leaf stage. The preflood N-star rate applied was (110 lbs Urea).  The field is now flooded and clean. 
Chicot 2

Roy J

April 23

Drill-Seeded

80 lbs/acre

Cruiser Maxx

May 2

18 plants/ft2

½ inch internode

The field received Command herbicide (10.6 oz/acre) plus League (3.2 oz/acre). The first post shot applied was Superwham (4 qts/acre) plus Facet L (21 oz/acre). The second shot recommended was Superwham (4 qts/acre) plus Facet L (21 oz/acre) plus crop oil (1%).  The preflood N-star rate applied was (200 lbs/acre Urea/NBPT). Mid-season urea fertilizer is now scheduled for application at (100 lbs/acre). 
Clark

CL XL 745

May 2

Drill-Seeded

23 lb/acre

RiceTec

May 17

9 plants/ft2

Early Tillering

Due to recent leveling no Command herbicide was applied. The first post shot was Clearpath (.5 lb/acre) plus crop oil (1%). Chicken Litter was applied on 6/21 (2 tons/acre) The second post shot was Newpath (4 oz/acre). The Preflood N rate was applied was (250 lbs/acre Urea/NBPT).   The field is dry and very late being flooded due to pump installation issues.  Hopefully the field will be flooded very soon.
Desha 

CL XL 745

May 13

Drill-Seeded

22 lbs/acre

RiceTec

May 27

8 plants/ft2

Panicle Initiation

Chicken Litter was applied on 5/16 at (1 ton/acre) Preemergence herbicides applied were Facet L (32 oz/acre) plus Command at (21 oz/acre). The first post shot was Newpath (6 oz/acre) followed by Newpath at (6 oz/acre). One half the field received preflood (230 lbs/acre Urea/NBPT) – while the other half had (165 lbs/acre Urea/NBPT)) and will follow up with (65 lbs/acre Urea) at late boot.
Jefferson

Roy J

April 27

Water-Seeded

Apron Maxx

80 lbs/acre

May 5

14 plants/ft2

Panicle Initiation

The field had a slow start with heavy aquaticand barnyardgrass pressure. Recommendation: Regiment (.5 oz/acre) plus Facet L (32 oz/acre) plus Dyna Pak adjuvant (1%).  Permit Plus was applied for nutsedge and smartweed control at (.75 oz/acre) plus crop oil (1%). Preflood N-star rate was (220 lbs/acre Urea/NBPT) After field was flooded water weevil scarring was prevalent. Recommendation: Belay insecticide (4.5 oz/acre). The field looks good other than some spots of barnyardgrass escapes.

 

 

 

Lincoln

CL XL 745

April 30

Drill-Seeded

RiceTec

26 lbs/acre

May 11

8 plants/ft2

Panicle Initiation

Due to all the early rain no command was applied. The first post shot applied was Clearpath (.5 lb/acre) plus Permit Plus (.75 oz/acre) plus crop oil (1 qt/acre). The second post shot was Newpath (6 oz/acre). The preflood N-star rate was (350 lbs/acre Urea).  The field is now clean.
Lee

Roy J

April 23

Drill-Seeded

75 lb/acre

CruiserMaxx

May 5

22 plants/ft2

Panicle Initiation

The field received Command (10.6 oz/acre) plus Roundup Weather Max (1 qt/acre) behind the drill. The first post shot was Superwham (3 qts/acre) plus Facet L (43 oz/acre) plus Permit Plus (.75 oz/acre).  The preflood N-star rate was (210 lb/acre Urea/NBPT).  The midseason N is scheduled to go out. Overall the field looks good.
Phillips

Roy J

May 13

Water-Seeded

80 lb/acre

Apron Maxx

21 Plants/ft2

May 20

Late

Tillering

The first herbicide recommendation: Rice Pro (4 qts/acre) plus Prowl H2O (2.1 pts/acre) plus Londax (1 oz/acre) plus crop oil (.5%).  Amazon Sprangletop has been very persistent.  The second post shot consisted of Facet L (26 oz/acre) plus crop oil (1 qt/acre). The preflood N-star rate was (240 lbs/acre Urea).   The field has had intermittent flooding to help the rice get established.

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