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15
Aug
2014
Arkansas Corn and Grain Sorghum Weekly Update – August 15, 2014
Author: Kevin Lawson, Program Associate - Corn & Grain Sorghum Verification

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

The Arkansas and White County corn fields have reached R6 (black layer).  Clay County is at R5.3 or about 30% starch.  The field was irrigated on August 14, and I recommended irrigation next week on August 21.  We should be around 50% starch next week so I anticipate that to be the last irrigation.  I will check all the other fields next week for R6.

The Chicot County grain sorghum field is ready for harvest.  Rain earlier this week has kept the producer out of the field.  Prairie County grain sorghum field is still drying down for harvest.

Average CRVP Growth and Development vs. 2014 CRVP.

 Corn Stages

5 Year Avg CRVP Days to Stages 2014 Avg CRVP Days to Stages 5 Year Avg CRVP Height (in) 2014 Avg CRVP Height (in) Avg CRVP Heat Units (2012 – 2013)

Avg CRVP Heat Units 2014

Planting

0 0 0 0
VE

10

10 0 0 145

177

V2

18

17 3 2 251

324

V4

28

26 6 5 425

506

V6

37

36 12 12 612

792

V8

45

43 22 19 791

1025

V10

51

48 36 34 922

1167

V12

56

53 52 49 1036

1302

V14

61

58 67 61 1155

1407

V16

65

63 82 73 1256

1500

R1

72

70 106 102 1452

1581

R2

78

76 115 112 1615

1716

R3

84

82 115 112 1811

1868

R4

91

89 115 112 2005

2038

R5

98

96 115 112 2199

2227

R6

122

  115 112 2919

 

Harvest

145   115 112

 

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

Harvest has begun on limited acres by growers with drying capabilities.  Early samples are running 21-22% moisture.  We have not progressed far enough into harvest to have a good feel for yields yet.

Central Arkansas Update – Brent Griffin (Prairie County)

Some sampling is occurring today of corn by growers who have batch driers. A few farmers are discovering areas where corn had poor pollination. Sorghum is nearing harvest with increasing sugarcane aphid.

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

Craighead County – Most fields have reached irrigation termination or will this week. Early planted fields could have samples cut in next few weeks. Grain sorghum continues to mature and irrigations continue. Fields are being scouted for headworms. Late planted fields are being scouted for midge and producers are warned not to automatically treat for midge. Treat only when treatment levels are reached to avoid “blowup” of sugarcane aphids.

Lawrence County – Several corn fields are drying down now and have little, if any , green left in the stalks in the fields.  I suppose the combines are not far from beginning to harvest these fields.  Grain sorghum continues to advance as well with some fields reaching hard dough.

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

Rainfall amounts varied this past week.  Those dryland fields that were fortunate enough to receive significant rain should be done as a result of being at or near black layer and cooler than normal temperatures.  Dryland field yields should be considerably better than last year. For the most part, corn is basically done.  Most farmers are letting it dry in the field because they do not have batch dryers.  Southern rust never really materialized due to cooler than normal conditions.  Biggest issue facing producers in the valley are those growers that planted milo.  Sugarcane aphid is running rampant with several acres being treated.  The biggest concern is the potential threat of another insecticide application prior to harvest.

Heat Units

Heat units remained just a little behind but close to the 30 year average this week.

 Region of the state (city)

Heat Units Accumulated Aug 9 – Aug 15

30 Year Average Heat Units Aug 9 – Aug 15

Southeast Arkansas (McGehee, AR)

190

199

Central Arkansas (Des Arc, AR)

185

203

Northeast Arkansas (Jonesboro, AR)

188

193

River Valley (Morrilton, AR)

187

188

Follow me on Twitter – Kevin Lawson @ar_cornverify


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