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Preliminary Yield Data for Grain Sorghum Trials, 2013

Preliminary Yield Data for Grain Sorghum Trials, 2013 published on No Comments on Preliminary Yield Data for Grain Sorghum Trials, 2013

By:

Dr. Rick Mascagni- Northeast Research Station

Dr. Josh Lofton- Macon Ridge Research Station

Table 1. Preliminary yield data in the grain sorghum hybrid performance trials for six locations and multiple planting dates (PD), 2013.
Brand/Hybrid Alexandria Crowley St. Joseph St. Joseph Bossier City Winnsboro Avg
Commerce silt loam Sharkey clay
PD1 PD2 PD1 PD2 PD1 PD2 PD1 PD2
lbs/acre
Pioneer 83P17 6,725 6,507 6,657 5,408 6,631 . 7,179 4,972 7,982 5,355 6,380
Pioneer 84G62 7,884 6,102 5,660 5,954 6,593 6,160 7,719 6,878 7,221 6,122 6,629
Pioneer 84P80 6,978 5,960 5,310 6,132 7,357 5,599 7,165 5,978 7,617 6,078 6,417
GA 5613 6,509 5,207 4,252 5,971 6,207 5,221 6,384 6,400 6,963 5,306 5,842
Dekalb DKS51-01 6,849 6,473 6,187 5,482 6,370 . 7,257 5,658 7,381 5,903 6,396
Dekalb DKS53-67 6,428 5,572 5,736 6,226 6,806 3,766 6,848 7,133 6,819 6,361 6,170
Dyna-Gro 765B 6,913 6,334 5,898 5,223 5,634 . 7,147 5,812 7,931 5,705 6,289
Dyna-Gro 766B 6,681 5,487 4,596 5,342 6,124 5,067 6,330 6,085 6,819 4,861 5,739
Dyna-Gro 771B 6,059 5,948 5,564 4,989 6,478 6,095 6,510 5,088 7,039 6,084 5,985
Dyna-Gro M77GB52 6,116 5,445 5,795 5,595 5,661 4,576 6,219 5,387 6,345 5,476 5,662
Dyna-Gro M75GB39 6,445 5,435 4,924 5,928 6,462 6,277 6,710 6,712 7,049 4,871 6,081
REV RV9562 5,627 6,134 5,141 5,647 7,197 5,621 6,863 6,802 7,239 4,873 6,114
REV RV9782 6,664 5,520 6,227 6,056 6,773 6,264 7,045 6,625 6,903 5,816 6,389
REV RV9794 6,348 6,036 4,882 5,155 6,180 4,172 6,696 5,867 7,344 4,690 5,737
REV RV9803 5,027 4,972 4,528 5,893 5,277 5,177 5,741 5,452 7,228 5,576 5,487
REV RV9823 5,913 6,179 5,418 5,608 6,290 6,230 6,358 5,949 7,348 4,210 5,950
REV RV9883 6,504 5,631 4,938 5,889 5,634 5,623 6,584 6,051 7,472 5,351 5,968
REV RV9924 6,723 6,373 5,188 6,193 6,517 6,107 6,936 6,478 7,414 5,282 6,321
REV RV9973 6,006 4,497 6,623 5,598 5,672 . 6,875 5,263 6,151 3,801 5,610
NK 6638 6,138 4,466 5,719 5,834 5,564 3,935 6,470 5,801 6,634 5,558 5,612
SP 7868 6,758 5,250 5,716 5,513 5,285 4,195 6,626 6,267 6,973 5,337 5,792
NK 8416 6,382 4,070 4,507 5,430 5,121 . 5,370 . 5,791 5,022 5,212
X865 6,546 5,123 5,220 5,417 5,700 4,322 6,179 5,942 7,532 4,750 5,673
X840 6,709 5,412 5,129 4,568 4,546 . 5,858 . 6,697 5,182 5,513
Average 6,445 5,589 5,409 5,627 6,087 5,311 6,628 6,027 7,079 5,319
CV, % 9.2 13.8 7.9 10.8 6.8 13.3 5.9 12.8 5.6 16.6
LSD (0.10) 701 909 501 714 491 840 464 908 415 927
Planting dates (PD) were April 9 and April 29 at Alexandria, March 21 and April 23 at Crowley, April 18 and May 14 on Commerce silt
loam at St. Joseph, April 9 and May 17 on Sharkey clay at St. Joseph, April 22 at Bossier City, and April 17 at Winnsboro.
Missing data at St. Joseph was due to severe midge damage.
All trials were dryland.

 

 

Preliminary data for the 2013 grain sorghum core block trials.
Hybrid Saint Joseph Bossier City State Averages
Yield (bu/ac)
Dyna-Gro 780B 123 106 114
Dyna-Gro 778B 106 84 95
Dyna-Gro 771B 114 99 106
Dyna-Gro M75G1339 101 65 83
Dyna-Gro M77GB52 106 102 104
Dyna-Gro 766B 98 92 95
Dekalb DKS 5400 92 59 76
Dyna-Gro 765B 93 60 77
Pioneer 84G77 93 55 74
Terral Rev 9782 109 66 66
Terral Rev 9562 105 77 77
Location average 103 80 92

2013 Macon Ridge Research Station Pest Management and Crop Production Field Day

2013 Macon Ridge Research Station Pest Management and Crop Production Field Day published on No Comments on 2013 Macon Ridge Research Station Pest Management and Crop Production Field Day

MRRS Flyer

Corn Leaf Aphid

Aphids in Grain Sorghum

Aphids in Grain Sorghum published on No Comments on Aphids in Grain Sorghum

Recently, David Kerns and I have been receiving more calls about aphids in grain sorghum. Three species of aphids colonize grain sorghum in Louisiana – corn leaf aphid, yellow sugarcane aphid and green bug.

The corn leaf aphid is blue to grayish green in color with black cornicles (twin exhaust pipes on rear of the body). Corn leaf aphids are typically found in the whorl, and development occurs sporadically throughout the growing season. Large populations can develop on larger plants; however, their effects on the crop are often negligible. As a general practice, control of corn leaf aphid is not recommended because this insect is seldom an economic pest.

Corn Leaf Aphid
Corn Leaf Aphid: Iowa State

The yellow sugarcane aphid has a lemon yellow body with a double row of dark spots down the back and is covered with small spines. Yellow sugarcane aphids will occasionally infest grain sorghum and can cause an issue due to the injection of a toxin when feeding. Areas of intense feeding will often result in purpling of young plants or chlorotic discoloration in older plants. Yield losses are most likely to occur in seedling infestations of this insect, but high numbers infesting older sorghum shouldn’t be ignored.

 

Yellow Sugarcane Aphid
Yellow Sugarcane Aphid: Kansas State

The green bug has a bright lime green body with a dark green stripe running down the middle of the back and cornicles with black tips at the end. Green bugs typically congregate on the underside of fully expanded leaves, and infestations are rare in Louisiana. This insect is a serious threat to grain sorghum because it will inject a toxin while feeding. Large numbers are capable of reducing yields and in extreme cases will cause plant mortality. If a green bug population does develop, consider the size of the plants, growing conditions, crop maturity and presence of beneficial insects when determining if an application is warranted. Applications may be justified when larger to preboot stage sorghum is exhibiting symptoms of red spotting or yellowing of leaves prior to leaf death. In preboot to mature sorghum, an application may be justified when green bugs cause desiccation of more than two of the lowest fully expanded leaves.

 

Green Bug
Green Bug: University of Tennessee

For more information or if you have any questions or concerns, please contact:

Sebe Brown at 318-498-1283 (cell) or 318-435-2903 (office)

Dr. David Kerns at 318-439-4844 (cell) or 318-435-2157 (office)

Dr. Julien Beuzelin at 337-501-7087 (cell) or 318-473-6523 (office)

 

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