Bromoxynil
Trade Names: Pardner, Koril, Bromotril, Brotex
Registration status: This herbicide is not registered for use in orchards.
When to suspect injury: Injury may occur from drift from neighbouring corn or cereal fields under windy conditions. If you notice symptoms of leaf scorch, look carefully at neighbouring cereal or corn fields, and at broadleaf weeds in the treated area.
Herbicide Information: Knowing how the herbicide works will help to determine the likelihood of injury from either direct application or drift. Consider how the herbicide works in plants, behaves in soils and what symptoms are common in other plants.
Chemical Family: Hydroxybenzonitrile
Site of Action/Group: Inhibitors of acetolactate synthase (ALS) and also called acetohydroxyacid synthase (AHAS) (WSSA Group 2)
General Symptoms in Plants
- Leaf scorch
- Injury may develop if the plant is under stress within 2 or 3 days before or after spray
- Injury usually does not affect yields
Symptoms in Fruit Trees
- Leaf scorching, likely on trees near field edges
Uptake and Translocation
- Absorbed by plant foliage
- Moves very little within the plant
Persistence
- Essentially no soil residual activity
If you suspect herbicide injury, laboratory analyses of herbicide levels in plant tissue are necessary to confirm the presence of herbicides, although symptoms may be helpful in diagnosing which herbicides caused the problem.
Both damaged and healthy plant tissues should be analyzed, because comparison levels are not readily available for many herbicides. Contact your lab for instructions on which plant parts should be sampled, how to handle and ship the sample, and what costs are involved to ensure an accurate and timely diagnosis.
