Chemical properties and HPPD inhibitor mode of action
- Active ingredient: Tembotrione 34.4% SC (triketone class, HRAC/WSSA Group 27 / F2).
- Mode of action: Inhibits 4-hydroxyphenylpyruvate dioxygenase (HPPD), preventing carotenoid biosynthesis and causing photo-oxidation of chlorophyll.
- Bleaching symptoms: Treated broadleaf and grassy weeds exhibit characteristic total bleaching (turning pure white) within 48 to 72 hours.
- Crop safety safener: Contains isoxadifen-ethyl safener, which accelerates herbicide metabolism inside the maize plant for superior crop safety.
Pack sizes, price determinants, and co-pack activator
- Co-pack formulation: Laudis is packaged together with a specialized surfactant (Activator / MSO) to enhance leaf wetting and cuticular penetration.
- Pack capacities: Marketed in 115 ml (half acre), 230 ml (one acre), and 460 ml (two acres) co-pack combinations.
- Price factors: Pricing reflects container size, freight logistics, and dealer margins in key maize belts like Karnataka, Telangana, and Bihar.
- Dealer verification: Procure only original sealed Bayer co-packs from authorized agricultural retailers with valid GST bills.
Application window, weed spectrum, and spray guidelines
- Weed spectrum: Controls Echinochloa colona, Digitaria, Commelina benghalensis, Trianthema portulacastrum, and Amaranthus viridis.
- Application window: Apply 15 to 20 days after maize sowing when weeds have 2 to 4 leaves and maize has 3 to 5 leaves.
- Dosage discipline: Use 115 ml of Laudis + 400 ml of Activator per half acre (or 230 ml + 800 ml per acre) in 150 litres of water.
- Spray equipment: Use knapsack sprayers fitted with flat fan nozzles for uniform swath coverage across crop rows.
Official source
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Central Insecticides Board & Registration Committee (CIBRC) ↗Related on KisanPe
Common questions
What is the active chemical in Bayer Laudis herbicide?
Laudis contains Tembotrione 34.4% SC along with isoxadifen-ethyl safener.
Why do weeds turn white after spraying Laudis?
It inhibits the HPPD enzyme, preventing protective carotenoid synthesis, which causes total chlorophyll bleaching under sunlight.
Why is an Activator co-packed with Laudis?
The Activator is a specialized adjuvant that enhances droplet spreading and chemical penetration into waxy weed leaves.
What is the recommended application timing for Laudis in maize?
Apply 15 to 20 days after sowing when weeds are small (2 to 4 leaves) and maize has 3 to 5 leaves.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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