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Ronstar® 25 EC

Ronstar® is a contact herbicide used across the world and has excellent pre- and post-emergence activity against weeds in families such as: Graminaceae, Amaranthaceae, Chenopodiaceae and Euphorbiaceae.

Recommendations and rates of use

CropPest/Weeds/MaladyDosePHI
Carnation NurseriesGrass weed3 – 5 l/ha applied in a water volume of 300 – 400 l water to moist soil (Spray before the weeds are actively growing and before transplanting).----
Carnation NurseriesAbroad weed3 – 5 l/ha applied in a water volume of 300 – 400 l water to moist soil (Spray before the weeds are actively growing and before transplanting).----
GrapeAbroad weed3-4 l/ha 100 – 200 l water on moist land before Convolvulus spp. weeds reach the grape vines. Grapes should be at least 2 years old. Avoid contact between Ronstar and grape vines (Direct the spray to the Convolvulus). ----
GrapeGrass weed3-4 l/ha 100 – 200 l water on moist land before Convolvulus spp. weeds reach the grape vines. Grapes should be at least 2 years old. Avoid contact between Ronstar and grape vines (Direct the spray to the Convolvulus). ----
Onion (Drectly Seeded)Abroad weed2.5 – 4l/ha (Spray when the onions reach 3-4 leaves. Spray when the soil is relatively moist, within 3 days from plant or transplanting and before the weeds reach onion (regardless the soil type and dose).7 days
Onion (Drectly Seeded)Grass weed2.5 – 4l/ha (Spray when the onions reach 3-4 leaves. Spray when the soil is relatively moist, within 3 days from plant or transplanting and before the weeds reach onion (regardless the soil type and dose).7 days
Onion (transplanted)Grass weed2.5 – 5 l/ha applied when the land is relatively moist, within 3 days from transplanting and before the weeds reach the onions (regardless the soil type and dose).7 days
Onion (transplanted)Abroad weed2.5 – 5 l/ha applied when the land is relatively moist, within 3 days from transplanting and before the weeds reach the onions (regardless the soil type and dose).7 days
OrnamentalsAbroad weed3 – 5 l/ha applied in a water volume of 300 – 400 l water to moist soil (Spray before the weeds are actively growing and before transplanting).----
OrnamentalsGrass weed3 – 5 l/ha applied in a water volume of 300 – 400 l water to moist soil (Spray before the weeds are actively growing and before transplanting).----
PeanutsGrass weed3 – 4 l/ha applied in a water volume of 100 – 200 l water. The soil must be moist at the time of spraying.21 days
PeanutsAbroad weed3 – 4 l/ha applied in a water volume of 100 – 200 l water. The soil must be moist at the time of spraying.21 days
Soya BeansGrass weed3 – 4 l/ha applied in a water volume of 100 – 200 l water. The soil must be moist at the time of spraying.21 days
Soya BeansAbroad weed3 – 4 l/ha applied in a water volume of 100 – 200 l water. The soil must be moist at the time of spraying.21 days
GarlicAbroad weed2.5 – 5 l/ha applied when the land is relatively moist, within 3 days from transplanting and before the weeds reach the onions (regardless the soil type and dose).7days
GarlicGrass weed2.5 – 5 l/ha applied when the land is relatively moist, within 3 days from transplanting and before the weeds reach the onions (regardless the soil type and dose).7days
Compatibility:
Consult the local label/distributor
How to apply:
  • Shake the bottle well before use, fill half of the tank with water, add the product in correct dose rate then fill to the end while agitation of the whole spray liquid
  • For ground application use standard boom sprayer fixed on the tractors.
  • Use water volume of 200 – 400 Lt./ha.
  • Observe speed travel to be 6 – 8 Km/h and spray pressure (2.5-3 Bar) to grantee equal and good coverage
Formulation:
Ronstar® 25 EC is an emulsifiable concentrate containing 250 g/l oxadiazon
Mode of action:
Pre-emergence effects are obtained at germination by contact with oxadiazon-treated soil particles. The development of the shoots is stopped as soon as they emerge - their tissues decay very rapidly and the plant is killed. When the soil is very dry, the pre-emergence activity is greatly reduced. Post-emergence effect is obtained by absorption through aerial parts of weeds which are rapidly killed in the presence of light. The treated tissues wither and dry out.
Distributor:
May Trade
WHO classification:
Product: slightly hazardous

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