Table 2: Weed control at Lubbock and Yoakum as influenced by pyrasulfotole plus bromoxynil combinations in 2009, 4 weeks after MPOST applications.

Weed control4,5
Herbicide1,2DoseTiming3A. palmeri U. texana C. melo
Kg ai/ha%

Untreated 0 0 0

Pyrasulfotole (P) 0.03
+Bromoxynil (B) 0.20 EP 100 64 100
+Atrazine (A) 0.58

P 0.04
+B 0.25 EP 100 66 100
+A 0.58

P 0.03
+B 0.20 EP 100 69 100
+A 0.58
+2,4-D Amine 0.22

P 0.03
+B 0.20 EP 100 59 100
+A 0.58
+dicamba 0.13

Atrazine0.58 EP 100 66 100
+bromoxynil 0.21

P 0.03
+B 0.20 MP 100 54 100
+A 0.58

P 0.04
+B 0.25 MP 94 43 100
+A 0.58

P 0.03
+B 0.20 MP 100 58 100
+A 0.58
+2,4 Amine 0.22

P 0.03
+B 0.20 MP 100 38 100
+A 0.58
+dicamba 0.13

Atrazine 0.58 MP 77 69 100
+bromoxynil 0.21

P 0.03
+B 0.20 EP + MP 100 68 100
+A 0.58

LSD (0.05) 13 18 NS

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), weeds 5 to 10 cm tall; MP (mid postemergence), weeds 10 to 20 cm tall. A. palmeri, Amaranthus palmeri S. Wats; U. texana., Urochloa texana (Buckl.) L.; C. melo., Cucumis melo L.  
4Rating scale (% weed control), 0: no control, 100: complete control.  
5All weeds present at Yoakum while . palmeri was present at Lubbock. A. palmeri ratings combined over locations due to a lack of interaction.