Chemical class, mode of action, and weed control spectrum
Tembotrione belongs to the triketone chemical family (HRAC Group 27) and offers swift knockdown of competitive weeds.
- 4-HPPD inhibition: Blocks the enzyme 4-hydroxyphenylpyruvate dioxygenase, causing rapid bleaching and tissue necrosis in susceptible weed foliage.
- Broadleaf weed control: Controls aggressive maize weeds such as Trianthema portulacastrum (itsit), Digera arvensis, Amaranthus viridis, and Commelina benghalensis.
- Grassy weed suppression: Highly effective against annual grassy weeds including Echinochloa colona (jungle rice) and Dactyloctenium aegyptium (crowfoot grass).
- Crop safety selectivity: Maize plants rapidly metabolize Tembotrione into harmless compounds, ensuring excellent crop tolerance without stunting.
Application stage, adjuvant mixing, and spraying technique
Achieving optimal herbicidal performance requires timely application during the recommended crop and weed vegetative stages.
- Application window: Apply when maize plants are at the 2 to 4-leaf stage and weeds are actively growing with 2 to 3 true leaves.
- Adjuvant requirement: Must be co-applied with the recommended surfactant or adjuvant to ensure uniform spreading and rapid cuticle penetration.
- Soil moisture condition: Ensure optimal soil moisture at application time; weed plants suffering from severe drought stress exhibit reduced chemical uptake.
- Sprayer equipment: Apply with a knapsack sprayer equipped with a flat fan nozzle to deliver uniform droplet coverage over the weed canopy.
Safety precautions, personal protective equipment, and handling
Applicators should strictly observe CIBRC approved label recommendations and dosing instructions. Always wear protective clothing, rubber gloves, and eye protection while preparing spray solutions. Do not spray during high winds to avoid drift onto sensitive neighbouring crops such as cotton, pulses, or vegetables. Thoroughly rinse sprayer tanks, hoses, and nozzles with clean water immediately after application.
Official source
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Directorate of Plant Protection, Quarantine & Storage (CIBRC) ↗Related on KisanPe
Common questions
What is the active ingredient in Bayer Laudis herbicide?
Laudis contains Tembotrione 34.4% SC, a selective triketone herbicide that inhibits the 4-HPPD enzyme.
For which crop is Laudis herbicide primarily recommended?
Laudis is formulated and registered primarily for post-emergence weed management in maize (corn).
Why do weeds turn white after applying Laudis?
Tembotrione blocks carotenoid synthesis, which leads to photo-oxidation of chlorophyll and causes the characteristic bleaching (whitening) of weed leaves.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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