Roundup CT Broadacre Herbicide By MonsantoPlant Protection Product ComparisonPlant Protection Product ComparisonReport inaccuraciesReport inaccuracies

GENERAL INSTRUCTIONS

Roundup CT is a non-volatile, non-selective, water-soluble liquid herbicide with non-selective herbicidal activity. It is absorbed by plant foliage and green stems and moves through the plant from the point of contact to and into the root system. Effects may not be apparent for 3–7 days (annual weeds) or 2–3 weeks (perennial weeds) or longer under cool, cloudy conditions.

Roundup CT will control emerged weeds only and provides no residual weed control. Apply treatments to weeds which have at least one true leaf (broadleaf weeds) or two leaves (grasses) to provide an adequate surface area for herbicide uptake.

Roundup CT may be used prior to sowing any crop (edible or non-edible) but not prior to transplanting tomato seedlings. A withholding period for grazing stock is not required. However, it is recommended that grazing of treated plants be delayed for one day after treatment of annual weeds or 7 days if perennial weeds are present to ensure absorption of Roundup CT. Certain plants (e.g., Soursob, variegated thistle) may be naturally toxic to stock. Where known toxic plants are present, do not allow stock to graze until complete browning of treated plants has occurred.

Weeds should be actively growing at the time of treatment. Do not treat weeds under poor growing or dormant conditions (such as occur in drought, waterlogging, disease, insect damage, or following frosts) as reduced weed control may result. Reduced results may also occur when treating weeds heavily covered with dust or silt. Prior herbicide application may also induce stress in weeds. Rainfall occurring up to 6 hours after application may reduce effectiveness. Rainfastness or general efficacy may be reduced if weeds are not actively growing, are under stress, or conditions of low light intensity/darkness. Heavy rainfall within 2 hours after application may wash the chemical off the foliage, and a repeat treatment may be required. Delay treatment of plants wet with dew or rain if water droplets run off when plants are disturbed. Avoid contact with foliage, green stems, or fruit of crops, desirable plants, and trees, since severe injury or destruction may result.

CROP ESTABLISHMENT

Roundup CT is recommended for the control of emerged weeds prior to crop establishment. Suitable cultivation and/or sowing operations are required to provide seed bed conditions satisfactory for crop germination and development. Spraying early to control young weeds will favor preparation of suitable seed beds. On friable soils and where there is only light cover of young weeds, sowing may proceed satisfactorily from one day after spraying.

In situations of heavy weed growth, sowing should be delayed until weed decay and soil conditions allow formation of a satisfactory seed bed. Incorporation of green or decaying vegetation and roots into the seedbed by cultivation or sowing may cause retarded crop emergence, particularly in cold and/or wet conditions. Vegetation may be reduced by grazing, and weed decay may be assisted by cultivation to leave trash on the surface. In marginal seedbed conditions, take care to achieve the correct seeding depth and avoid the use of pre-emergence herbicides where label directions advise of the risk of retarded crop emergence.

MIXING

Roundup CT mixes readily with water. Note Reduced results may occur if water containing soil is used, e.g., water from ponds and unlined ditches, or if hard water containing calcium salts is used. DO NOT mix, store, or apply this product or spray solutions of this product in galvanized steel or unlined steel containers or spray tanks, since a highly flammable gas mixture may be formed. Use stainless steel, aluminum, brass, copper, fiberglass, plastic, or plastic-lined containers or spray tanks. Ensure the sprayer is free of any residue of previous spray materials. Use spray solutions promptly and certainly within 5 days since a gradual loss of activity will occur. Fill the spray tank with one-half the required amount of clean water and add the proper amount of Roundup CT. Mix well before adding the remaining portion of water. Add surfactant near the end of the filling process to minimize foaming. Placing the filling hose below the surface of the spray solution will prevent excessive foaming. Removing the hose from the tank immediately after filling will prevent back siphoning into the water source. Do not use mechanical agitators as these may cause excessive foaming. Spray tanks, pumps, lines, and nozzles should be thoroughly rinsed with clean water following application to prevent corrosion.

TANK MIXTURES/COMPATIBILITY

Roundup CT may be tank-mixed with the following herbicides, insecticides, and additives. Read and follow all label directions, restraints, plant-back periods, withholding periods, regional use restrictions, and safety directions for the tank mix products.

MIXING INSTRUCTIONS FOR ALL TANK MIXTURES

1. Fill the spray tank 1/3 to 1/2 full with clean water and start agitation.
2. Add Liase where required.
3. Add recommended herbicide/insecticide/additive to the spray tank and mix thoroughly.
4. Add Roundup CT and the remaining water. Mix thoroughly.
5. Add surfactant, if required, near the end of the filling process to minimize foaming.
6. Always maintain adequate agitation during application and use the tank mix promptly.

TANK MIXTURES – HERBICIDES

Ally, Archer, Associate, Avadex Xtra, Comet 400, Nufarm Estercide Xtra 680, Express, Flame, Garlon 600, Glean, Hammer, Invader, Kamba 500 (dicamba), Lusta, Logran 750WG, Logran B Power (ensure fully dispersed prior to the addition of Roundup CT), Lontrel, LVE Agritone, MONZA, Nugran, Nu-trazine 600, Nu-trazine 900 DF (DO NOT apply this tank mix for control of Barnyard grass or Liverseed grass), Rifle, Flowable Simazine, Nufarm Simazine 900 DF, Starane 200, Stomp, Striker, Nufarm Surpass 475, TriflurX, and Triflur Xcel (trifluralin). Other brands have not been tested. *Liase (Ammonium sulphate) may improve the performance of tank mixtures of Roundup CT and atrazine or simazine. See directions below.

STRIKER

The addition of Striker at 75 mL/ha to recommended rates of Roundup CT prior to planting Wheat or Barley or prior to planting cotton will improve knockdown and increase the speed at which treated weeds develop visible symptoms of phytotoxicity.

TANK MIXTURES - INSECTICIDES

Roundup CT is compatible with the following insecticides: Imidan, Le-Mat, Lorsban 500, Pirate 300, Karate, Sumithion ULV, Talstar, and emulsifiable concentrates of dimethoate and fenitrothion. Other insecticides have not been tested.

TANK MIXTURES - ADDITIVES

Nufarm Liase (417 g/L Ammonium Sulphate liquid) RATE: 2 L per 100 litres spray solution. Liase may be used as an adjuvant to alleviate the adverse effects of high levels of calcium, magnesium, and bicarbonate ions in water. The addition of Liase to Roundup CT, when used to control annual weeds, MAY improve the performance of Roundup CT under adverse environmental conditions such as cool, cloudy weather. Liase may also improve the performance of tank mixtures of Roundup CT and atrazine or simazine. Ammonium sulfate may be corrosive to metal parts of the sprayer. Thoroughly flush tanks, pumps, and nozzles with water after use. Solubility and impurity profiles of other forms of ammonium sulfate can vary and may reduce the performance of Roundup CT or tank mixtures.

Nufarm LI 700 Surfactant RATE: 250 mL - 500 mL per 100L. The addition of LI 700 surfactant MAY improve weed control. At rates of 300 mL-500 mL per 100L, LI 700 may modify the droplet spectrum produced by CP and flat fan nozzles. This may reduce the proportion of FINE droplets produced by these nozzles.

Nufarm Activator RATE: 70 mL - 125 mL per 100L. General-purpose non-ionic surfactants may increase the production of FINE and VERY FINE droplets, which are prone to drift when used through certain nozzle types.

Wetter TX Surfactant RATE: 200 mL /100L spray solution. Add when treating Annual Ryegrass, Silvergrass, and Perennial grasses. Wetter TX is NOT a general-purpose surfactant and should be used only where recommended. DO NOT use spray oils, adjuvants, or surfactants other than those recommended on this label.

APPLICATION

Roundup CT is a non-selective translocated herbicide. Direct spray contact, or even slight drift, may cause severe injury or destruction of any growing crop or other desirable plants including trees. Clean all equipment after use by thoroughly washing with water.

BOOM EQUIPMENT

Application of Roundup CT in spray volumes of 25-100 L/ha is recommended for broadacre uses and 200L/ha or less for treeline and vineline spraying in orchards and vineyards. Glyphosate works better when it is present at a higher concentration in the spray solution provided sufficient coverage of the target is achieved. Nozzles and pressure settings should be selected to deliver a COARSE to VERY COARSE spray quality (as defined by ASAE S572 Standard) at the target. The use of nozzles and/or pressure settings that produce VERY FINE or FINE spray quality should be avoided as these are prone to loss or drift. Environmental conditions, including delta T, wind speed and direction, and the size and density of the target weeds, should be taken into consideration when selecting nozzles. To minimize off-target drift, apply with the lowest boom height to achieve double overlap of the spray pattern at the top of the target.