Active chemistry and bleaching mode of action
Laudis contains Tembotrione 34.4% SC, an active ingredient belonging to the triketone chemical family of 4-hydroxyphenylpyruvate dioxygenase (HPPD) inhibitors.
It blocks the HPPD enzyme responsible for synthesizing plastoquinone and carotenoid pigments. Without carotenoids, chlorophyll molecules are destroyed by excess sunlight, turning weed foliage completely white within days followed by plant necrosis.
- Active chemical: Tembotrione 34.4% SC.
- HRAC group: Group 27 (HPPD inhibitor / bleaching herbicide).
- Crop safener: Formulated with a specialized safener (Isoxadifen-ethyl) that accelerates herbicide metabolism in maize plants, ensuring excellent crop tolerance.
Target weeds and recommended application window
Laudis is specifically registered for post-emergence weed management in field corn, sweet corn, and popcorn.
It provides broad-spectrum control over challenging broadleaf weeds and annual grasses competing with young maize crops.
- Application timing: Apply post-emergence at 15 to 25 days after sowing when weeds are at the 2 to 4-leaf stage.
- Grasses controlled: Echinochloa colonum, Digitaria sanguinalis, and Brachiaria species.
- Broadleaf weeds controlled: Trianthema portulacastrum, Amaranthus viridis, Commelina benghalensis, and Digera arvensis.
Adjuvant requirement, dilution, and spraying advice
To maximize foliar absorption, Laudis must always be mixed with its recommended surfactant or adjuvant (such as specialized methylated seed oil adjuvant) in the spray tank.
Maintain adequate soil moisture in the field during application to ensure active weed growth and rapid herbicide uptake.
- Mandatory adjuvant: Always mix with the prescribed adjuvant supplied with the product for optimal leaf penetration.
- Nozzle recommendation: Use knapsack or tractor-mounted boom sprayers fitted with flat fan nozzles for uniform foliar deposition.
- Soil moisture: Ensure good topsoil moisture; avoid applying during prolonged drought or moisture stress.
Official source
Check the latest rules, benefits and forms here. KisanPe is an independent platform and is not a government website.
ICAR - Directorate of Weed Research ↗Related on KisanPe
Common questions
What is the active ingredient in Bayer Laudis herbicide?
Laudis contains Tembotrione 34.4% SC, a selective HPPD-inhibitor bleaching herbicide.
Why do weeds turn white after spraying Laudis?
Tembotrione inhibits carotenoid pigment synthesis, leaving chlorophyll unprotected from sunlight, causing rapid bleaching and tissue death.
Is Laudis safe for all varieties of maize?
Yes, its built-in safener enables maize plants to rapidly metabolize the herbicide, providing high crop safety across field and hybrid maize.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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