Active chemistry and 4-HPPD inhibition mode of action
Laudis belongs to the triketone chemical family (HRAC Group 27).
Key biochemical characteristics:
- Active ingredient: Tembotrione 34.4% Suspension Concentrate (SC).
- Built-in safener technology: Contains Isoxadifen-ethyl, which selectively accelerates metabolic degradation of Tembotrione in maize tissue, ensuring complete crop safety.
- 4-HPPD enzyme inhibition: Blocks the plant enzyme 4-hydroxyphenylpyruvate dioxygenase, stopping carotenoid biosynthesis in susceptible weeds.
- Sunlight bleaching effect: Deprived of protective carotenoids, weed chlorophyll is destroyed by sunlight, causing target weeds to turn completely white within 48 to 72 hours.
- Complete weed breakdown: Bleached weeds undergo cellular necrosis and die completely within one to two weeks after application.
Target weeds and maize application window
Laudis provides exceptional control of mixed weed flora in corn fields:
Primary target weeds:
- Broadleaf weeds: Trianthema portulacastrum (carpetweed), Amaranthus viridis, Digera arvensis, and Commelina benghalensis.
- Grassy weeds: Echinochloa colona (jungle rice), Dactyloctenium aegyptium (crowfoot grass), and Brachiaria species.
- Optimal spraying window: Apply when the maize crop is at the 2 to 4-leaf stage and weeds are actively growing with 2 to 3 true leaves.
- Surfactant requirement: Always tank-mix with the recommended adjuvant (such as stefes MERO) as directed on the CIBRC label to optimize leaf wetting and penetration.
Spraying best practices and field precautions
Calibrate spray equipment using a flat-fan or flood-jet nozzle to ensure uniform coverage over target weed foliage. Apply Laudis when there is adequate soil moisture in the maize field. Do not apply when heavy rain is expected within two hours, and wear protective gloves and a face shield during mixing and application.
Official source
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Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What is the active ingredient in Laudis herbicide?
Laudis contains Tembotrione 34.4% SC, a 4-HPPD inhibitor herbicide.
Why does Laudis turn weeds white after spraying?
It inhibits carotenoid synthesis, which leaves chlorophyll unprotected from sunlight, causing rapid photo-oxidation and complete bleaching of weed tissues.
Is Laudis safe for all stages of maize crops?
Laudis is crop-safe for maize due to its built-in safener (Isoxadifen-ethyl), and is best applied when maize has 2 to 4 leaves.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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