Chlorosulfuron
Trade Name: Telar, Truvist
Group 2
Site of Action: Inhibitors of acetolactate synthase (ALS) and also called acetohydroxyacid synthase (AHAS)
Symptoms
- Following POST emergent application:
- Within an hour the inhibition of ALS enzyme leads to a rapid cessation of cell division and plant growth
- Within 1- 2 weeks symptoms become visible
- Meristematic regions are the first to experience chlorosis and necrosis followed by general foliar chlorosis and necrosis
- The most recently emerged leaf at time of application will show a characteristic Group 2 “flash” (a chlorotic band running perpendicular across the middle of the leaf)
Uptake and Translocation
- Thoroughly systemic after absorption of either foliage or roots.
- Foliar absorption is rapid.
Persistence
- Half-life is 4–6 weeks under growing season conditions.
- Degradation is faster with higher soil temperatures and/or lower soil pH.
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