Terrazole L
Terrazole L
Product Overview
Terrazole® L/WP (FRAC 14) are fungicides designed for the prevention and management of soilborne diseases caused by Pythium and Phytophthora species. For optimal results, Terrazole L/WP should be applied at the first sign of disease symptoms and used only at recommended rates to avoid potential harm to sensitive plants.
Terrazole L/WP are fungicides designed for commercial greenhouse- and nursery-grown ornamentals. The active ingredient etridiazole (L = 44.3%; WP = 35%) inhibits lipid peroxidation, functioning as both a preventive and “kickback” treatment. For optimal results, applications should begin at the first sign of disease, with retreatment intervals ranging from two to 12 weeks depending on host susceptibility and disease pressure.
Key Benefits
- Targets diseases like damping off, root rot, and stem diseases caused by Pythium and Phytophthora species
- It can be applied as a soil drench or spray
Use & Control
Key diseases controlled (Controls diseases caused by Pythium spp. and Phytophthora spp.):
- Water mold
- Damping off
- Root rot
- Stem rot
- Crown rot diseases
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State Approvals
Terrazole L has been federally approved. Check back often to see its registration status in your state and contact your Envu representative to learn more.

This map was most recently updated June 2, 2025
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