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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.
|No.||Treatment||Weed Injury, 1-5 Scale***||Price per acre****||Sponsor (click on company name to visit official website)|
|7 Day||24 Day|
|# 1||*||Valor @ 1.00 OZ. (DRY WT.) + Roundup Ultra Max (5lb./gal) @ 25.60 OZ. + Crop Oil @ 16 OZ.||3.1a||4.0a||13.37||Valent|
|# 2||*||Valor @ 2.00 OZ. (DRY WT.) + Roundup Ultra Max (5lb./gal) @ 25.60 OZ. + Crop Oil @ 16 OZ.||3.2b||4.1a||18.37||Valent|
|# 3||**||Boa @ 28.80 OZ. + Direx 80 DF @ 16.00 OZ. (DRY WT.) + Harmony Extra @ 0.33OZ. (DRY WT.) + 80/20 Surfactant @ 0.125% v/v||4.2a||4.7a||8.91||Griffin LLC|
Gramoxone Max @ 24.00 OZ. + Caparol @ 24.00 OZ. + 80/20 Surfactant @ 0.25% v/v
|# 5||*||Glyphomax Plus @ 32.00 OZ. + 2-4 D Amine @ 16.00 OZ.||2.7bc||4.4a||8.87||Dow Agrosciences|
|# 6||*||Touchdown IQ @ 32.00 OZ. + 2-4 D Amine @ 16.00 OZ.||2.7bc||4.4a||9.12||Syngenta|
|# 7||*||Roundup Ultra Max (5lb./gal) @ 26.00 OZ. + 2-4 D Amine @ 16.00 OZ.||2.7bc||4.4a||8.99||Monsanto|
|# 8||Untreated check||1.0d||1.0b||N.A.||N.A.|
|# 9||**||Gramoxone Max @ 26.67 OZ. + 80/20 Surfactant @ 0.25% v/v||4.4a||4.5a||7.20||GAPAC Standard|
|# 10||*||Glyphomax Plus @ 32.00 OZ. + Goal @ 6.40 OZ. + 80/20 Surfactant @ 0.25% v/||2.4c||4.0a||11.61||Dow Agrosciences|
|# 11||*||Roundup Ultra (4lb./gal.) @ 32.00 OZ.||2.2c||4.0a||5.13||GAPAC Standard|
|# 12||**||Liberty @ 28.00 OZ.+ AMS @ 48.00 OZ. (DRY WT.)||4.8a||5.0a||17.28||Aventis|
|# 13||**||Liberty @ 32.00 OZ. + AMS @ 48.00 OZ. (DRY WT.)||4.8a||5.0a||19.83||Aventis|
|* Treatments 1, 2, 5, 6, 7, 10, and 11 were applied at a 10 GPA rate with a CO2 Spray System. Spray Tips used were TT 11001.5 Flat Fan Tips At 5.0 MPH. with a 4-Row boom.|
|** Treatments 3, 4, 9, 12, and 13 were applied at a 20 GPA rate with a CO2 Spray System. Spray Tips used were TT 11003 Flat Fan Tips At 5.0 MPH. with a 4-Row boom.|
|*** Weed Identity: CUTLEAF EVENING PRIMROSE. NOTE: MEANS FOLLOWED BY THE SAME LETTER DO NOT SIGNIFICANTLY DIFFER (P = .05)|
****Approximate cost per acre; actual costs will vary.
The test treatments were selected by participating companies. The trial locations were selected by participating consultants. All sites received adequate rainfall prior to treatment but little to none was received during the test period. At test conclusion, conditions were extremely dry at the Brooks, Decatur and Dodge County locations and overall weed growth and survival at these sites was adversely affected. Cutleaf evening primrose was present at all site locations. Significant differences between treatments were observed in control of this weed at 7 days following application but not at 24 days. The only location with new weed emergence sufficient to rate by test conclusion was in Dougherty County where some rainfall was recorded. Smallflower and Iveyleaf morninglory emergence was most evident there in treatments which did not have residual activity.
Cutleaf evening primrose control at all locations at 7 days after application was superior with the Liberty treatments and with the treatments containing paraquat. However, at 24 days after application, no significant treatment differences for control of this weed were evident and all treatments were providing good to excellent control. In some cases, the prolonged drought may have improved treatment efficacy by retarding regrowth of sprayed weeds and new weed germination. Horseweed or marestail was present in Dougherty County and was also best controlled by Liberty and by treatments containing paraquat at 7 days after application. Curly dock caused some problem for all treatments at the Houston County site. Best residual activity on late emerging morninglory at the Dougherty County location was observed with treatments containing Valor.
Summary Written By: Kent Taylor
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Copyright 2001, Georgia Association of Professional Agricultural Consultants