FAQs

What is Laudis® herbicide?

Laudis postemergence corn herbicide has the power to control weeds safely on corn crops. Laudis provides powerful residual control of more than 65 grass and broadleaf weeds with unsurpassed crop safety in all types of corn. Laudis is an effective resistance management tool in a tankmix with Liberty® herbicide or glyphosate against even the toughest glyphosate-, PPO-, ALS-, and dicamba-resistant broadleaf weeds.

What is the mode of action?

Laudis is a bleacher. It is a triketone herbicide that inhibits the 4-hydroxyphenylpyruvate dioxygenase (HPPD) enzyme in plants. This enzyme is key to the production of protective pigments in plants. By preventing pigment production, chlorophyll in plants is destroyed by the sun’s ultraviolet rays.

What weeds does Laudis control?

Laudis is unique in that it controls both grass and broadleaf weeds, yet can be used on all types of corn. Key broadleaf weeds controlled with Laudis include*: pigweed, tall and common waterhemp, giant and common ragweed, common lambsquarters, velvetleaf, sunflower, nightshade and common cocklebur. Key grass weeds controlled with Laudis include*: giant and yellow foxtail, woolly cupgrass, barnyardgrass, shattercane, large crabgrass, broadleaf signalgrass and seedling Johnsongrass.

*See the Laudis label for a complete list of grass and broadleaf weeds controlled or suppressed.

What are the symptoms of Laudis activity on weeds?

Initial symptoms are whitening of the leaf tissue or burning of leaf margins of the weeds. Laudis works very rapidly, and a complete kill can happen within 7 days of application. The speed of activity varies based on the environmental conditions following the application.

Is Laudis safe to the crop?

Laudis provides outstanding crop safety in all types of corn. Crop tolerance to Laudis is unsurpassed within the same herbicide chemical family, as well as phenoxy and SU chemistries. Hybrid field corn, popcorn varieties and inbred field corn have shown no sensitivity to Laudis. The vast majority of sweet corn hybrids has also shown excellent tolerance.

What is the use rate?

Laudis is used at 3 fl oz/A for broad-spectrum grass and broadleaf weed control. Use 2 fl oz/A of Laudis when combining with 22 fl oz/A of Liberty.

What is the application timing for Laudis?

Laudis may be applied to field corn and popcorn from crop emergence up to the V8 growth stage (eight emerged leaf collars) and up to V7 for sweet corn. For maximum corn yields, it is important to remove weed competition well before weeds reach 4 inches in height. While larger weeds may be controlled with Laudis, earlier timings will result in better protection of the crop yield from weed competition.

How should Laudis be applied?

Laudis activity is primarily through foliar uptake but also through some soil activity. Applications should take place on small, actively growing weeds. Mix Laudis with enough water to provide adequate coverage and penetration of the crop canopy.

Does Laudis need any adjuvants or surfactants?

Yes. Methylated Seed Oil (MSO) concentrates containing a minimum of 10 percent emulsifiers should be used at 1 percent v/v with the spray volume. High Surfactant Oil Concentrates (HSOC) are also recommended alternatives. A high-quality ammonium nitrogen fertilizer, such as UAN at 1.5 qt/A or AMS at 8.5 lb/100 gal, is also required. Any adjuvants not meeting these standards may result in unacceptable or erratic weed control.

What are the recommended tankmix partners?

The most common tankmix partners for Laudis include atrazine, Liberty (on LibertyLink hybrids) and glyphosate (on glyphosate-tolerant hybrids). Atrazine, at as little as 0.5 lb AI/A, will improve the speed, spectrum and consistency of the weed control. The adjuvant system must still be used when atrazine is in the tank, and MSO is the recommended surfactant for optimal weed control. When applied with Liberty or glyphosate, use adjuvants recommended for the respective systems. Tankmixes of Laudis with Liberty or glyphosate will enhance control of large, stressed, tolerant, resistant or otherwise difficult-to-control weeds in these herbicide-tolerant systems.

How long does the residual weed control last?

Laudis provides residual control of key grass and broadleaf weeds. Laudis residual depends on the weed species and pressure in your fields. Talk to your local Crop Science US representative for specific recommendations and anticipated residual control on your key weeds.

What is the rainfastness?

Laudis is rapidly absorbed into the plant tissue and is rainfast within one hour of application. Rainfall within an hour after application may result in poor weed control.

Is carryover a concern with Laudis?

Laudis has a very favorable profile in the soil. Other postemergence HPPD herbicides have been known to carry over to soybeans and other crops. Laudis provides better rotational flexibility and more grower choices.

What are the crop rotation restrictions?

Field corn, sweet corn, popcorn and seed corn may be planted at any time following a Laudis application. Soybeans may be planted after an 8-month interval. Potato, tomato, sorghum, peas, cotton, canola, alfalfa and snap beans may be planted after 10 months. Sugar beets and certain dry bean types also may be planted after 10 months in conjunction with accumulated precipitation levels and cultural practices (see label for details). Other crops have an 18-month plant-back restriction. Planting at shorter intervals may result in injury to the crop rotation.

What is the maximum amount of Laudis that can be applied in one year?

For sweet corn, one application of up to 3 fl oz/A per year. For all other corn, a maximum of 6 fl oz/A of Laudis may be applied per growing season. Applications should be at least 7 days apart.

What is the signal word on the Laudis label?

The signal word is CAUTION. Laudis should not be considered a Restricted Use Pesticide.

Are there any insecticide interactions?

No. Due to the high level of crop tolerance to Laudis, there are no use restrictions following liquid or granular insecticide applied at planting. Any labeled foliar insecticides may be tankmixed with Laudis as well. Be sure to check mixing compatibility.

Is the safener also active on other chemistries?

Yes. This proprietary safener has been shown to improve crop tolerance to dicamba, Accent®, Steadfast®, and other HPPD herbicides.
Laudis

View all labels / MSDS

Learn more about Laudis postemergence corn herbicide and see how well it works in the field. » more
Launch Compare Tool
Evaluate your corn herbicide options and determine the best weed management solutions for your farm. » Get Started
Copyright © Bayer CropScience