Table 3: Grain sorghum injury and yield as influenced by pyrasulfotole plus bromoxynil combinations in 2008.

Herbicide1,2 DoseTiming3
Chlorosis4,5 Stunting Yield
CorpusYoakumLubbockYoakumLubbockYoakumCorpus
Kg ai/ha% Kg/ha

Untreated 0 0 0 0 0 2072 3465

Pyrasulfotole (P) 0.03
+Bromoxynil (B) 0.20 EP 13 3 6 3 0 2539 3385
+Atrazine (A) 0.58

P 0.04
+B 0.24 EP 13 8 7 3 0 2333 3253
+A 0.58

P 0.03
+B 0.20 EP 8 12 13 7 6 2268 3375
+A 0.58
+2,4-D 0.27

P 0.03
+B 0.20 EP 8 10 7 3 2 2430 3266
+A 0.58
+dicamba 0.13

Atrazine 0.58 EP 0 0 0 0 0 2051 3521

P 0.03
+B 0.20 MP 0 20 12 23 0 1639 3411
+A 0.58

P 0.04
+B 0.24 MP 0 20 13 10 0 1486 3582
+A 0.58

P 0.03
+B 0.20 MP 4 6 5 0 10 1344 3527
+A 0.58
+2,4-D 0.27

P 0.03
+B 0.20 MP 0 5 5 0 0 1758 3134
+A0.58
+dicamba 0.13

Atrazine 0.58 MP 0 0 8 0 4 1583 3267

P 0.03
+B 0.18 EP + MP 8 17 15 3 0 2203 3493
+A 0.58

P 0.03
+B 0.21 EP
+A 0.58 10 15 16 2 3 2430 3237
P 0.03MP
+B 0.18

P 0.04
+B 0.26 EP
+A 0.58 13 22 20 7 5 2137 3724
P 0.03MP
+B 0.18

P 0.03
+B 0.26 EP
+A 0.58 25 25 20 23 0 1324 3668
P 0.03 MP
+B 0.26

LSD (0.05) 5 7 4 10 2 678 NS

At Corpus Christi and Yoakum, all herbicide treatments with the exception of the untreated check included S-metolachlor at 1.11 kg ai/ha applied preemergemce. Also, all treatments with the exception of atrazine alone include ammonium sulfate at the rate of 3.9 kg/378 L.
2Agridex at 1.0% v/v added to all treatments at Corpus and Yoakum while R-11 at 0.25% was added to all treatments at Lubbock with the exception of the atrazine only treatments which included Agridex at 1.0% v/v.  
3Abbreviations: EP (early postemergence), grain sorghum 5 to 10 cm tall; MP (mid postemergence), grain sorghum 30 to 41 cm tall.
4Rating scale: 0: crop injury; 100: crop death.
5Chlorosis and stunting ratings taken 10 days after herbicide application.