Table 4: Grain sorghum response and yield as influenced by pyrasulfotole plus bromoxynil combinations in 2009.

Herbicide1,2DoseTiming3 Chlorosis4 Stunting Yield
YoakumLubbockYoakumLubbock
Lubbock
Kg ai/ha% Kg/ha

Untreated 0 0 0 0 5312

Pyrasulfotole (P) 0.03 EP 8 5 8 7 7963
+Bromoxynil (B) 0.20
+Atrazine (A) 0.58

P 0.04 EP 10 9 9 7 7389
+B 0.25
+A 0.58

P 0.03 EP 4 2 2 27 7547
+B 0.20
+A 0.58
+2,4-D Amine 0.22

P 0.03 EP 5 4 18 7 7896
+B 0.20
+A 0.58
+dicamba 0.13

Atrazine 0.58 EP 2 2 3 1 8058
+bromoxynil 0.21

P 0.03 MP 9 27 7 10 8093
+B 0.20
+A 0.58

P 0.04 MP 12 30 8 13 7928
+B 0.25
+A 0.58

P 0.03 MP 8 14 6 2 6816
+B 0.20
+A 0.58
+2,4 Amine 0.22

P 0.03 MP 5 12 9 5 7165
+B 0.20
+A 0.58
+dicamba 0.13

Atrazine 0.58 MP 15 17 1 10 7135
+bromoxynil 0.21

P 0.03 EP + MP 19 38 19 20 8588
+B 0.20
+A 0.58

LSD (0.05) 7 4 9 6 1709

All herbicide treatments with the exception of atrazine + bromoxynil included ammonium sulfate at the rate of 3.9 kg/378 L.  
2Agridex at 1.0% v/v added to all treatments at Yoakum while R-11 at 0.25% was added to all treatments at Lubbock.
3Abbreviations: EP (early postemergence), grain sorghum 5 to 10 cm tall; MP (mid postemergence), grain sorghum 30 to 41 cm tall.
4Rating scale, 0: no chlorosis or stunting, 100: plant death. Chlorosis and stunting ratings taken 10 days after herbicide application.