Tips For Use
2,4-D B 500 Herbicide is best applied to small weeds and works better under warmer conditions, usually in spring, summer or early autumn.
In clover, seedling lucerne and medic based pastures a tank mix with Flumetsulam Herbicides (Broadstrike, Broadsword, Broadblade etc) will improve control of certain broadleaf weeds. This mix can also be used in cereals undersown with pasture legumes. In established lucerne, 2,4-D B 500 Herbicide can be mixed with Imazethapyr Herbicides (ie Amaze 700, Kyte & Mainsail 700), Flumetsulam, or Diuron to improve and extend weed control.
These tank mix options can be used in situations where there:
- Are a range of weed sizes/ages present
- Is a heavy population of weeds such as capeweed, shepherd’s purse, ox-tongue, flatweed (dandelion), marshmallow, peppercress, fat hen, nettles (deadnettle or stinging nettle)
- Are conditions that may become less suitable for 2,4-D B 500 Herbicide to work alone, within two weeks after application (eg-cooler weather forecast)
- Is a need to use spray grazing (7 to 10 days after application) to assist in controlling larger weeds
- Is a benefit from having some residual weed control (when using Mainsail Imazethapyr 700 WG in medic or lucerne)
How 2,4-Db 500 Herbicide Works:
- 2,4-DB is an inactive form of the phenoxy molecule and after spraying onto weeds, it must first be converted by the weeds into 2,4-D, then finally into the active 2,4-D acid.
- For effective use weeds must be actively growing when using 2,4-D B 500 Herbicide. If 2,4-D B 500 Herbicide is ‘held’ in the weed for a period of time as the inactive form because the weed is not growing, efficacy will be affected.
- Plants are usually actively growing when daytime temperatures are above 15 degrees Celsius and there are no frosts.
- Seedling clovers and medics do not have the ability to convert the 2,4-DB into the 2,4-D acid, however, as they mature, they develop the ability to do this which is why 2,4-D B 500 Herbicide is safest on young pasture species. Damage symptoms may increase after they reach the 8 leaf stage.
- Do not apply if rain is expected within 4 hours.
- Do not apply to crop or weeds under stress (not actively growing) due to periods of extreme cold or heat, moisture stress (water logged or drought affected), poor nutrition or previous herbicide treatments as increased levels of crop effect and/or reduced levels of weed control may result.
- Do not use with hard water (>500 ppm) or water containing suspended matter
- Before opening, carefully read Directions for Use, Precautionary Statements, Safety Directions and First Aid Instructions.
- Mix with the required amount of water in the spray tank or mixing vessel
- . Apply using a low volume boom spray fitted with fan jets, or by aircraft.
- Use mains or rain water for mixing. If not available water with a hardness of less than 500 ppm (expressed as calcium carbonate equivalent) can be used but is not preferred.
- Do not tank mix Ammonium sulphate with Apparent Machete 500 Herbicide in hard water for this may cause nozzle blockages.
- Apply using boom or spot spray equipment.
- Application must be uniform. Nozzle type, output, speed and pressure should be adjusted to deliver a Coarse spray quality (ASAE S 527) in 110 – 220 litres per hectare by ground application and a minimum of 40 litres of water per hectare by aerial application.
Protection of Crops, Native and Other Non-Target Plants:
- Drift warning: Do not apply under meteorological conditions or from spraying equipment which could be expected to cause spray drift onto nearby susceptible plants, adjacent crops, crop lands or pastures.
- Avoid spray drift and vapour movement onto susceptible crops such as cotton, tobacco, tomatoes, vines, lupins, fruit trees and ornamentals.
Spray-Grazing Warning (Protection of Livestock):
- Some pasture weeds can be controlled by Spray-Grazing a combination of herbicide treatment followed by heavy grazing 7 – 10 days later.
- Sprayed weeds become more palatable to stock and a higher intake of some weed species after spraying can cause stock deaths and other problems.
- Increased quantities of poisonous plants may be eaten by stock when the Spray-Grazing technique is being used.
- Take care if pastures are dominated by Caltrop, Capeweed, Cape Tulip, Paterson’s curse (Salvation Jane) or Variegated Thistle.
- With Paterson’s Cures preferably graze stock soon destined for slaughter and avoid extended periods of grazing.
- Avoid grazing with young or breeding stock. Do not graze horses or pigs in Paterson’s curse (Salvation Jane) infested pasture.
- Store in the closed, original container in a cool well-ventilated area.
- DO NOT store for prolonged periods in direct sunlight.
- Poisonous if swallowed.
- May irritate the eyes and skin.
- This product is alkaline.
- Avoid contact with the eyes and skin.
- Do not inhale spray mist.
- When preparing spray, wear cotton overalls buttoned to the neck and wrist and washable hat, elbow-length PVC gloves and face shield.
- When using the prepared spray wear cotton overalls buttoned to the neck and wrist and washable hat.
- If producton skin, immediately wash area with soap and water.
- After use and before eating, drinking or smoking, wash hands, arms, and face thoroughly with soap and water.
- After each day’s use, wash gloves, face shield and contaminated clothing.
- If poisoning occurs, contact a doctor or Poisons Information Centre. Phone Australia: 13 11 26.
- Additional information is listed in the Safety Data Sheet (SDS).
Withholding Period Details (WHP):
- Do not graze for cut for stock feed for 7 days after application