Table 1: Weed control at Lubbock and Yoakum as influenced by pyrasulfotole plus bromoxynil combinations in 2008, 4 weeks after MPOST applications.

Weed control4
Herbicide1,2DoseTiming3A. palmeri U. texana P. louisianica
Kg ai/ha%

Untreated 0 0 0

Pyrasulfotole (P) 0.03
+Bromoxynil (B) 0.20 EP 100 33 100
+Atrazine (A) 0.58

P 0.04
+B 0.24 EP 100 23 100
+A 0.58

P 0.03
+B 0.20 EP 100 33 100
+A 0.58
+2, 4-D 0.27

P 0.03
+B 0.20 EP 100 33 100
+A 0.58
+dicamba 0.13

Atrazine 0.58 EP 98 20 100

P 0.03
+B 0.20 MP 100 47 100
+A 0.58

P 0.04
+B 0.24 MP 100 50 100
+A 0.58

P 0.03
+B 0.20 MP 100 33 100
+A 0.58
+2,4-D 0.27

P 0.03
+B 0.20 MP 100 55 100
+A 0.58
+dicamba0.13

Atrazine 0.58 MP 100 30 100

P 0.03
+B 0.18 EP + MP 100 45 100
+A 0.58

P 0.03
+B 0.21 EP
+A 0.58 100 47 100
P 0.03 MP
+B 0.18

P 0.04
+B 0.26 EP
+A 0.58 100 33 100
P 0.03 MP
+B 0.18

P 0.03
+B 0.26 EP
+A 0.58100 50 100
P 0.03 MP
+B 0.26

LSD (0.05) 1 12 NS

1 At Yoakum, all herbicide treatments with the exception of the untreated check included S-metolachlor at 1.11 kg ai/ha applied preemergemce. At both locations, all herbicide 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 Yoakum while R-11at 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), weeds 5 to 10 cm tall; MP (mid postemergence), weeds 10 to 20 cm tall; A. palmeri, Amaranthus palmeri, S. Wats; P. louisianica, Proboscidea louisianica (Mill.) Thellung; U. texana, Urochloa texana L.  
4Weed rating scale: 0: no control; 100: complete control. A. palmeri was present at both locations while U. texana was present at Yoakum and P. louisianica was present at Lubbock. A. palmeri ratings were combined over locations due to a lack of interaction.