Touchdown is a powerful, non-selective, glyphosate-based herbicide from Syngenta that kills a wide variety of annual and perennial weeds, including grasses and broadleaf types, by inhibiting essential amino acid production. It's systemic, meaning it moves through the plant to kill roots, and is used in non-cropped areas like roadsides, orchards, and for pre-planting land prep, with visible effects often seen in 7-10 days. 

• Active Ingredient: Glyphosate (typically 41% SL in many formulations).
• Action: Systemic, post-emergence, non-selective.
• Controls: All annual and perennial weeds, grasses, and broadleaf weeds.
• Use Areas: Non-cropped areas, tea plantations, orchards, forestry, industrial sites, and for pre-planting.
• How it Works: Blocks an enzyme (EPSPS) needed for protein synthesis, leading to plant death.
• Visible Effect: 7-10 days after application, depending on conditions. 

• Dosage: Varies by area and weed type, often around 0.8-1.2 liters/acre or 3-4 liters/hectare.
• Method: Foliar spray on actively growing weeds.
• Caution: Avoid spraying on standing crops as it's non-selective and can kill them.
• Water Quality: Use clean, soft water for best results.