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BroadStar Herbicide is a selective preemergence herbicide that provides extended residual control of weeds listed on this label. BroadStar Herbicide is labelled for use in container-grown ornamentals. BroadStar Herbicide should not be applied in residential or commercial landscapes.
Weeds Controlled
• Hairy bittercress/snapweed (Cardamine hirsuta)
• Liverwort (Marchantia polymorpha)
Suppression only:
• Common groundsel (Senecio vulgaris)
• Common chickweed (Stellaria media)
Mode of Action
BroadStar Herbicide controls weeds by inhibiting protoporphyrinogen oxidase (PPO), an enzyme essential for chlorophyll biosynthesis. Germinating weeds are controlled preemergence when exposed to sunlight following contact with the soil-applied herbicide.
BroadStar Herbicide binds tightly to soil particles in normal growth conditions, it does not inhibit or limit the growth of roots.
Application
• For optimal pre-emergence control, apply BroadStar Herbicide before weed seeds germinate.
• Approximately 1-2 cm of rainfall, overhead sprinkler irrigation or hand irrigation is required to activate BroadStar Herbicide.
• Irrigate plants immediately after application (within one hour) with 1-2 cm of water to wash the particles off of the plant foliage.
• Inadequate irrigation or rainfall following application may reduce effectiveness of BroadStar Herbicide.
• Drip irrigation cannot be relied upon to ensure activation of BroadStar Herbicide.
• If adequate soil moisture is maintained following application, BroadStar Herbicide will provide residual control of the listed weeds. | 
