A selective, post emergence, foliar absorbed, translocated herbicide for control of broad-leaved weeds in grass pastures and crops.
7 APPLICATION METHODS AND TIPS:
Best results when applied to young actively growing plants.
For boom applications, 50 L/ha water or more is recommended on the label. Water rates down to 30 L/ha appear to be adequate.
For aerial application, 25 L/ha water or more is recommended on the label.
For high volume applications, apply in 1000-1500 L/ha water and spray plants until just wet.
For basal bark application mix 40 mL dicamba 500 in 10 water and apply to the lower 50 cm of the trunk for trees up to 5 cm diameter.
10 WATER QUALITY:
Hard water - There may be a slight loss of activity due to ionic bonding in very hard water.
Colloids - Some loss of activity as the amount of clay in the water increases. If it is difficult to see a coin on the bottom of a 10 litre bucket full of water then the water should be cleared or an alternate source found.
pH -Acidic water is usually OK. Highly alkaline water may cause loss of efficacy.
Zinc sulphate and copper sulphate are antagonistic with dicamba. This is caused by ionic reactions and results in a significant loss of efficacy. Manganese sulphate and calcium carbonate (lime) have lesser effects.
Boom, aerial, high volume and low volume application
14 HERBICIDE RESISTANCE:
18 PROTECTIVE CLOTHING:
20 MODE OF ACTION:
Hormone. Disrupts plant cell growth.
Uptake and translocation:
Absorbed mainly through leaves with minor absorption through roots. Highly translocated especially into woody rootstocks and rhizomes of plants like Dock, Sorrel and Spiny Emex
Residual Life and Breakdown:
Little effect on grasses. Affects many broadleaf species.
Under some environmental conditions dicamba may reduce cereal yields (Wilhelm et al., 1995).
Effect on Clover Species:
Effect on Medic Species:
Effect on Lucerne:
Effect on Native Plants:
22 DISEASE AND INSECT EFFECTS:
23 PLANT SYMPTOMS:
Curling and distortion of new growth about 1 week to one month after spraying.
Poison schedule - S
Mammalian toxicity -
Acute oral LD50 - mg/kg (rats), [For comparison table salt is 3000 mg/kg]
Acute dermal LD50 - > mg/kg (rabbit).
Skin - Not irritating.
Eye - Not irritating.
Vapour inhalation - LC50 - > mg/L air (rat).
Chronic oral toxicity NOEL - mg/kg for two years.
Not carcinogenic, teratogenic or mutagenic test animals (i.e. does not cause cancer). At normal exposure levels there were no reproductive effects in mice. At 10-20 mg/kg/day there were reduced foetal weights, toxic effects on mothers, and increased loss of foetuses in mice.
Acceptable Daily Intake (ADI) -
Exposure to high levels over long periods causes changes in the liver and reduced body weights in rats.
Excreted rapidly in the urine with 1-4% in faeces. 90-99% is excreted intact in urine.
Loss of appetite (anorexia), vomiting, muscle weakness, slowed heart rate, shortness of breath, excitement or depression, incontinence, cyanosis (blueness of gums and skin), exhaustion following repeated muscle spasms.
Inhalation may cause irritation of the lining of the lungs and nasal passages and loss of voice.
26 FIRST AID:
If SWALLOWED - Give some water to drink.
If in EYES - Irrigate with plenty of water.
If on SKIN - Rinse with plenty of water, remove contaminated clothing, wash with soap and water.
If INHALED - Remove patient to fresh air.
If symptoms persist, see a doctor.
Advice to doctor - Treat symptomatically.
27 ENVIRONMENTAL FATE:
Half life in soil - <14 days in aerobic conditions. 88 days in anaerobic conditions. Typically 1-4 weeks in field soils. Degraded by micro organisms. Degradation is faster in slightly acidic soils and increase with temperature and moisture up to 50%. Degradation is slower in soils with more than 50% moisture (i.e. waterlogged soils)
Half life in water - Stable in pure water. Microbial breakdown in pond water with a half life of approximately 7 days.
Breaks down slowly in sunlight.
It has an EPA classification for soil mobility that ranges from high.
Ground water contamination. High likelihood of leaching. Low likelihood of surface runoff. Leaches form soil in 3-12 weeks.
Accumulation in milk and tissues - Does not accumulate.
pH stability - Stable.
Photolysis rate - Medium.
Hydrolysis half life - 30 days.
Biodegradation rate - 1-28 days in soil.
Break down in plants - Accumulates in the tips of mature leaves. Disappears form plants by exudation from the roots into the soil, metabolism in the plant or loss from leaf surfaces.
28 REGISTERED CROPS: (Button)
29 REGISTERED WEEDS: (Button)
30 REGULATION AND LEGAL:
UN number - NA
Dangerous goods class - Not a dangerous good.
Hazchem code -
Proper shipping name -
Packaging group -
CAS number - 2300-65-5
Water solubility at 25 C. - 61,000 mg/L to completely soluble. High.