bromoxynil
Trade Name: Bromax, Bromotril, Brotex 240, Brotex 480, Pardner, Koril
Group 6
Site of Action: Inhibitors of photosynthesis at photosystem II, Site B
Symptoms
Injury is confined to foliage that has come in contact with the herbicide. Low doses of this herbicide mimics phosynthetic inhibitors: yellowing of the leaf margins or tips and yellowing between the leaf veins of broadleaf plants. High doses mimic cell membrane disrupters: chlorosis and wilting occur within 3-5 days followed by necrosis within 1-2 weeks. Symptoms occur faster in bright sunlight and high humidity.
Uptake and Translocation
- Most readily absorbed through the roots.
- Translocation is upward with the movement of water to leaves where it inhibits photosynthesis.
Persistence
- Half-life is 5–6 months for 4.4 kg/ha bromacil in a silty loam soil.