paraquat
Trade Name: Gramoxone
Group 22
Site of Action: Photo system I - electron diverters
Symptoms
Following POST emergent application:
- Within a few hours, in full sunlight, the plant wilts and dries out
- In 1- 3 days complete foliar necrosis occurs
- Injury from drift can occur and presents itself as spots of dead leaf tissue wherever there is contact by spray droplets
Uptake and Translocation
- Absorbed by foliage and green bark
- Little or no translocation
Persistence
- Highly persistent but residues are tightly adsorbed and unavailable in the soil
- Essentially no residual activity in soil
- Half-life in field: 1000 days