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Arkansas Corn and Grain Sorghum Weekly Update – May 23, 2014
Author: Arkansas Row Crops

Corn and Grain Sorghum Research Verification – Kevin Lawson (Corn & GS Verification Coordinator)

What an interesting week in the verification fields.  As I started walking fields on Monday (May 19), I noticed cold stress, water stress and several purple plants.  By Thursday (May 22) fields started looking better and were starting to perk up.  Even though we just had a rain event, I am recommending producers lay poly pipe and be ready to irrigate when needed.



Growth Stage

Weekly Rain



Arkansas DKC64-69 VT3P



Recommended laying out poly pipe and be prepared for irrigation. (Scouted May 22)
Clay DKC64-83 VT3P



Corn is still emerging in spots.  Will do stand counts next week. (Scouted May 20)
Jefferson DKC62-08 SS



Applied 100 lbs of DAP + 50 lbs of Urea on May 8 (41 units N).  Recommended 30 gallons of 32% (105 units N) followed by 3.6 pts of Halex GT + 1.5 qts of Atrazine.  (Scouted May 19)
Lee DKC66-87 VT2P



Recommended 1.5 qts of Atrazine + 1 qt of glyphosate. (Scouted May 21)
Lonoke Armor 1330



Applied 1.5 qts of Atrazine, 1.3 pts of Dual + crop oil on May 20.  Recommended 100 lbs of Ammonium sulfate + 180 lbs of Urea (104 units N). (Scouted May 22)
Mississippi Pioneer 2089YHR



Recommended 1 qt of glyphosate + 1 qt of Atrazine followed by 240 lbs of Urea (110 units N).  (Scouted May 20)
St Francis Terral 26BHR50



Recommended 3.6 pts Halex GT followed by 200 lbs of Urea + 100 lbs of Ammonium sulfate (113 units N).  (Scouted May 21)
White Armor 1550PRO



Recommended 3.6 pts of Halex GT + 1.5 qts of Atrazine.  (Scouted May 21)

———–Grain Sorghum———-

Chicot Dyna-Gro 765B



Field is progressing well.  (Scouted May 19)
Prairie Pioneer 84P80



Recommended 1.5 qts of Atrazine + crop oil followed by 175 lbs of Urea (81 units N). (Scouted May 21)


Southeast Arkansas Update – Wes Kirkpatrick (Desha County) & Kevin Norton (Ashley County)

The corn is really starting to grow after tapping in to the nitrogen that was applied prior to last week’s rainfall.  The nitrogen in addition to warm temperatures and sunshine has resulted in most corn having that dark green look.  Wind has still been an issue for herbicide applications, but we are chipping away at it when possible.  Some poly pipe is being laid, with some irrigation being initiated soon.

Central Arkansas Update – Brent Griffin & Michael Paskewitz (Prairie County)

At Des Arc we received 5.35″ inches of rain last week. Prairie County growers are waiting for dry soil conditions to resume herbicide and nitrogen applications which are behind schedule due to saturated fields and high winds. The corn and grain sorghum have some discoloration from the cold and wet conditions.

Northeast Arkansas Update – Herb Ginn (Lawrence County) & Branon Thiesse (Craighead County)

Craighead- The County received 2-3 inches of rain out of the storm system that moved through on Sunday night and Monday. We were very fortunate as surrounding counties received much greater amounts. There was very little evidence of hail damage, although the weather service reported some may have fallen with this system. Flooded fields near drainage ditches and streams are causing problems with crops that are already emerged. Some fields are completely under water and some just on the ends. Depending on how rapidly the water recedes will determine crop damage. Warmer drier weather for the next 10 days will be a welcomed.   They should be able to get back in the fields sometime this weekend.

Lawrence – Field work resumed on Monday in most fields.  There are still many fields that have sizable wet spots in them, but with the sunny weather and strong winds these should be gone soon.  Overall the corn crop looks pretty good with many fields around the V6 growth stage.  Spraying has come to a standstill throughout this week so far because of high winds, but the remainder of the week looks favorable for spraying to resume as winds are predicted to calm.

River Valley Update – Kevin VanPelt (Conway County) & Hank Chaney (Faulkner County)

We’ve been seeing the corn show stress due to the wet cold conditions with some hybrids turning purple and looking stunted overall. Most fields have already shown signs of recovery just in the last couple of days with improved weather conditions this week. It’s also allowed producers to get back in the fields to finish getting their fertilizer out.

Heat Units

The week started out very cool with not much heat unit accumulation, but by the end of the week temperatures were in the high 80’s and even reached the 90’s in a few areas of the state.  Corn has really responded to the warm up in a positive way and is starting to look better.   It is taking about 634 heat units on average from planting to reach V6 in the corn verification fields.

Region of the state(city)

Heat Units Accumulated May 16 – May 23

30 Year Average Heat Units May 16 – May 23

Total Heat Units Since March 9

30 Year Average Heat Units Since March 9

Southeast Arkansas (McGehee, AR)





Central Arkansas (Des Arc, AR)





Northeast Arkansas (Jonesboro, AR)





River Valley (Morrilton, AR)





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