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Tables from:


Sellers, B. A., Cordes, J. C., Smeda, R. J., and Johnson, W. G. 2004. Waterhemp
control in transgenic and conventional corn varieties. Online. Crop Management
doi:10.1094/CM-2004-1208-01-RS.



Table 1. Herbicide rates for herbicide programs in transgenic corn.

Strategyx Timingx Herbicide Program
Roundup Ready Liberty Link Clearfield
Herbicidey Rate Herbicide Rate Herbicide Rate
PRE at+ac/ PRE atrazine &
acetochlor fb		 0.55
1.11		 atrazine &
acetochlor fb		 0.55
1.11		 atrazine &
acetochlor fb		   0.55
  1.11
MPOST glyphosate +
atrazine		 0.56
1.00		 glufosinate +
atrazine		 0.31
1.00		 imazethapyr &
imazapyr +
atrazine		   0.042
  0.014
  1.00
LPOST LPOST glyphosate +
atrazine		 0.75
1.00		 glufosinate +
atrazine		 0.45
1.00		 imazethapyr &
imazapyr +
diflufenzopyr +
dicamba		   0.042
  0.014
  0.04
  0.14
PRE at/ PRE atrazine fb 1.50 atrazine fb 1.50 atrazine fb   1.50
MPOST glyphosate +
atrazine		 0.56
0.50		 glufosinate +
atrazine		 0.31
0.50		 imazethapyr &
imazapyr +
atrazine		   0.042
  0.014
  0.50
PRE if/ PRE isoxaflutole fb 0.05 isoxaflutole fb 0.05 isoxaflutole fb   0.05
MPOST glyphosate +
atrazine		 0.56
1.00		 glufosinate +
atrazine		 0.31
1.00		 imazethapyr &
imazapyr +
atrazine		   0.042
  0.014
  1.00
--  -- weedy check -- weedy check -- weedy check --
-- weed free -- weed free -- weed free --

 x MPOST = 5 inch weeds; LPOST = 7 inch weeds.  Abbreviations: PRE = after planting before emergence; PRE at+ac/ = preemergence atrazine plus acetochlor; LPOST = late-postemergence; PRE at/ = preemergence atrazine; PRE if/ = preemergence isoxaflutole.

 y All herbicide rates expressed in lb ai/acre except glyphosate expressed in lb ae/acre.

Table 3. Common waterhemp density (per 88 ft2) recorded in mid-August in glyphosate- (glyt), glufosinate- (gluf) and imidazolinone- (imaz) resistant corn at Columbia, Novelty, and Albany, MO in 2001 and 2002.

Herbicide
Strategyx 		 Columbia
2001		 Columbia
2002		 Novelty
2001		 Novelty
2002		 Albany
2001		 Albany
2002
glyt gluf imaz glyt gluf imaz glyt gluf imaz glyt gluf imaz glyt gluf imaz glyt gluf imaz
PRE at+ac/ 2 2   5   0   0   0 133 19   43 0   1   0     5     2     2   0   0   0
LPOST 8 6   2   0   0   0 106 37   15 2 20   1   34   29     6   1   5   1
PRE at/ 8 8 11   0   0   0 114 50   52 6   7 33   31   23 355   5   1 15
PRE if’ 3 4   6   2   0   0   55 16   21 7   3 33   62   21   29   5   0   5
UNTREATED 5 3   2 53 52 46   57 16 118 4   4   5 388 683 151 58 46 43
LSD (0.05)y NS NS 46 14 132 2
LSD (0.05)z NS NS 28   9   81 1

 x Abbreviations: PRE at+ac/ = preemergence atrazine plus acetochlor; LPOST = late-postemergence; PRE at/ = preemergence atrazine; PRE if/ = preemergence isoxaflutole.

 y LSD for comparing means within columns.

 z LSD for comparing means within rows.

Table 4. Glyphosate- (glyt), glufosinate- (gluf) and imidazolinone- (imaz) resistant corn yield (bu/acre) at Columbia, Novelty, and Albany, MO in 2001 and 2002.

Herbicide
Strategyx 		 Columbia
2001		 Columbia
2002		 Novelty
2001		 Novelty
2002		 Albany
2001		 Albany
2002
glyt gluf imaz glyt gluf imaz glyt gluf imaz glyt gluf imaz glyt gluf imaz glyt gluf imaz
PRE at+ac/ 125 127 115 176 173 170 150 163 149 110 117 121 111 119 117 102 79 76
LPOST 125 127 104 153 163 169 157 156 148 110 103 102 103 116 104   95 81 78
PRE at/ 130 128 120 164 170 171 151 172 156 121 122 116 113 112   99   94 84 74
PRE if/ 140 128 106 167 163 137 147 164 157 120 121 116   95 115 103   94 82 78
LSD (0.05)y NS NS NS NS NS NS
LSD (0.05)z NS NS NS NS NS NS

 x Abbreviations: PRE at+ac/ = preemergence atrazine plus acetochlor; LPOST = late-postemergence; PRE at/ = preemergence atrazine; PRE if/ = preemergence isoxaflutole.

 y LSD for comparing means within columns.

 z LSD for comparing means within rows.