Return to GAPAC home page.
The GAPAC Burndown Demonstration Treatments Results Page, consolidated ratings for all five locations.

Ratings were made at 7-10 days after treatment and again at 20 - 25 days after treatment; click on individual plot links to see individual ratings, including ratings on weeds specific to those individual locations..

7 Day State Summary Report 21 Day State Summary Report
Bleckley Houston Crisp Brooks Jefferson

GAPAC BURNDOWN DEMO'S
+ 7 DAY SUMMARY - AVERAGE OF 5 LOCATIONS  ( + 21 DAY SUMMARY BELOW, or click here)

                WEED INJURY ON 1 - 5 SCALE

          (A)          (B)
GRIFFIN LLC
(1) Glyphosate Original @ 1 Qt/A +  3.0 c 2.680 bcd
2,4-D Amine @ 1 Pt/A + Harmony
Extra @ 0.25 oz/A + 80/20 NIS @ 0.5% v/v
(2) Boa @ 1qt/A + 2,4-D`Amine @  4.4 a 4.420 a
1 Pt/A + Harmony Extra @ 0.25 oz/A +
80/20 NIS @ 0.5% v/v
BASF
(3) Clarity @ 8 oz/A + 80/20 NIS @ 2.0 d 1.932 d
0.25% v/v
VALENT
(4) Valor @ 2 oz/A + Roundup UltraMax @  3.8 b 3.610 b
19.2 oz/A + COC @ 1 Qt/A
MONSANTO
(5) Roundup UltraMax @ 26 oz/A + 3.0 c 2.852 bcd
2,4-D Amine @ 1 Pt/A
UNTREATED CHECK
(6) Untreated Check 1.0 e 1.000 e
FMC
(7) Roundup UltraMax @ 26 oz/A + 2.7 c 2.952 b
Aim @ 1 oz/A
(8) Aim @ 1 oz/A + 80/20 NIS @ 2.1 d 1.950 d
0.25% v/v
DOW
(9) Glyphomax Plus @ 32 oz/A + 3.0 c 2.710 bcd
2,4-D Amine @ 1 Pt/A
SYNGENTA
(10) Touchdown @ 32 oz/A + 3.0 c 2.976 bc
2,4-D Amine @ 1 Pt/A
(11) Gramoxone Max @ 20 oz/A +   4.4 a 4.560 a
Caparol @1 Pt/A + 80/20 NIS @ 0.25% v/v
GAPAC
(12) Gramoxone Max @ 24 oz/A + 4.5 a 4.682 a
80/20 NIS @ 0.25% v/v
(13) Roundup Ultra @ 32 oz/A 1.9 d 2.182 cd
(A) = Cutleaf Eveningprimrose  
Growth Stage =
(B) =
(B) = All Other Weeds   
LSD(P=.05)     0.426

0.643

Standard Deviation

0.337

0.5084

1 = No Injury     2 = Slight Injury      3 = Moderate Injury      4 = Severe Injury      5 = Dead 
GAPAC BURNDOWN DEMO'S
 + 21  DAY SUMMARY - AVERAGE OF 5 LOCATIONS
                WEED INJURY ON 1 - 5 SCALE
          (A)          (B)    
GRIFFIN LLC
(1) Glyphosate Original @ 1 Qt/A +  3.9 de 4.8 a
2,4-D Amine @ 1 Pt/A + Harmony
Extra @ 0.25 oz/A + 80/20 NIS @ 0.5% v/v
(2) Boa @ 1qt/A + 2,4-D`Amine @  5.0 a 5.0 a
1 Pt/A + Harmony Extra @ 0.25 oz/A +
80/20 NIS @ 0.5% v/v
BASF
(3) Clarity @ 8 oz/A + 80/20 NIS @ 2.7 f 2.58 b
0.25% v/v
VALENT
(4) Valor @ 2 oz/A + Roundup UltraMax @  4.4 bcd 4.86 a
19.2 oz/A + COC @ 1 Qt/A
MONSANTO
(5) Roundup UltraMax @ 26 oz/A + 4.4 bcd 4.82 a
2,4-D Amine @ 1 Pt/A
UNTREATED CHECK
(6) Untreated Check 1.0 h 1.0 c
FMC
(7) Roundup UltraMax @ 26 oz/A + 4.0 cde 4.76 a
Aim @ 1 oz/A
(8) Aim @ 1 oz/A + 80/20 NIS @ 2.0 g 2.3 b
0.25% v/v
DOW
(9) Glyphomax Plus @ 32 oz/A + 4.4 bcd 4.67 a
2,4-D Amine @ 1 Pt/A
SYNGENTA
(10) Touchdown @ 32 oz/A + 4.5 bc 4.62 a
2,4-D Amine @ 1 Pt/A
(11) Gramoxone Max @ 20 oz/A +   5.0 a 5.0 a
Caparol @1 Pt/A + 80/20 NIS @ 0.25% v/v
GAPAC
(12) Gramoxone Max @ 24 oz/A + 4.6 ab 4.8 a
80/20 NIS @ 0.25% v/v
(13) Roundup Ultra @ 32 oz/A 3.8 e 4.57 a
(A) = Cutleaf Eveningprimrose  
Growth Stage =
(B) =
(B) = All Other Weeds   
LSD (P=.05) 0.367 0.4652
Standard Deviation 0.297 0.3678
1 = No Injury     2 = Slight Injury      3 = Moderate Injury      4 = Severe Injury      5 = Dead 

GAPAC BURNDOWN TRIAL SUMMARY

The project consisted of 13 treatments in 5 trials at 5 locations in 4 row by 150 foot long plots in no till cotton fields. Sites were selected by participating consultants in Bleckley, Houston, Crisp, Brooks and Jefferson Counties and treatments were selected by participating companies. Treatments were applied by Danny Bennett and plots were rated by Kent Taylor. Soil moisture was high when the trials were initiated and weeds were in a succulent state. However, no further rainfall was recorded during the course of the trials and all locations were extremely drought stressed by 21 days after treatment. Unfortunately, drought conditions are not uncommon to the area at this time of the year. The trials were initiated in mid April when all winter weeds were mature and in a flowering state. Cutleaf eveningprimrose, which is considered by many to be the most troublesome winter weed, was present in sufficient numbers to rate at all locations. In general, the paraquat based treatments provided quick burndown with no regrowth under these drought stressed conditions while the qlyphosate based treatments were slower and less effective. One might speculate that, had drought conditions not been present, that there may have  been some regrowth where the paraquat was used.  Also, one might speculate that had the treatments been applied much earlier, when the weeds were still in a vegetative state, that conditions would have been more favorable to glyphosate than to paraquat. Glyphosate product uptake may have been better on actively growing weeds and regrowth may have been more of a problem with paraquat. This is strictly speculation and should not be interpreted as fact but is certainly worthy of further testing. I suggest that additional tests be conducted next spring to compare applications in late February and/or early March with applications in April. No new germination was noted in the plots through 21 days which may also be contributed to the drought. At the time of the 21 day ratings, it should be noted that grasshoppers were feeding heavily on the Cutleaf eveningprimrose at all locations and it will be interesting to see if they become a problem on the planted crop.

Summary Written By: Kent Taylor

Return to GAPAC home page.

Copyright 2001, Georgia Association of Professional Agricultural Consultants