MCPA
Trade Names: Checkmate, MCPA Ester, MCPA-Sodium Salt, MCPA Amine
Group 4
Site of Action: Synthetic auxins
Symptoms
At first symptoms include:
- Bending, twisting, swelling and elongation of stems
- Leaf cupping and curling
Followed by:
- Chlorosis at the growing points
- Growth inhibition
- Wilting
- Necrosis, and death of susceptible plants within 3- 5 weeks
- Low concentration may cause young leaves to look puckered
Uptake and Translocation
- Absorbed through leaves or roots
- Translocates to, and accumulates at, growing points of roots and shoots
Persistence
- Some soil residues can be detected for up to 1 month under moist conditions and 2 months under drier conditions
Photographs courtesy of:
F.A Holm and Ken Sapsford at University of Saskatchewan - Department of Plant Sciences - Weeds Research - Herbicide Injury Symptoms:
Click to enlarge
