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Laudis® Herbicide

Laudis® herbicide provides exceptional control of annual broadleaf weeds and grasses (including glyphosate resistant biotypes) in field corn and sweet corn with excellent crop safety.

Product Summary

Product Type

Herbicide

Crops

Field corn
Sweet corn

Weeds Controlled

Canada fleabane
Giant ragweed
Waterhemp

Groups & Active Ingredients

Tembotrione (Group 27)

Formulation Type

Suspension concentrate

Packaging

3.6 L jugs

Early crops field decorative image

Performance

  • Excellent post emergence broadleaf control and grass suppression, including tough to control glyphosate resistant weeds such as Canada fleabane, giant ragweed, and waterhemp
  • Built-in safener for exceptional crop safety on field corn and sweet corn types with favorable rotation intervals for soybeans, potatoes, spring wheat and winter wheat
  • Rapid burndown and up to 3 weeks of residual activity at the high rate of 220 mL/ha (89 mL/ac.)
  • Excellent resistance management tool and tank mix partner with Roundup® brands

Efficacy - Waterhemp (n=5)

Atrazine
65c
Armezon® herbicide + atrazine
87ab
Callisto® herbicide + atrazine
94ab
Laudis + atrazine
98a
Visual Weed Control (&) 12 WAA

Treatment means are significantly different at p<.05

Benoit, L., Soltani, N., Hooker, D., Robinson, D., Sikkema, P. Efficacy of HPPD_inhibiting herbicides preemergence or postemergence for control of multiple herbicide resistant waterhemp [Amaranthus tuberculatus (Moq.) Saur]. Can. J. Plant Sci. 99:3 https://cdnsciencepub.com/doi/full/10.1139/cjps-2018-0320

Crops

  • Field corn
  • Sweet corn

Effective Against

Weeds Controlled:

  • Canada fleabane*
  • Common ragweed*
  • Common waterhemp*
  • Giant foxtail**
  • Giant ragweed*
  • Green foxtail**
  • Kochia*
  • Redroot pigweed*
  • Velvetleaf*

* Includes ALS/SU (Group 2), auxin (Group 4), glyphosate (Group 9), PPO (Group 14), and triazine (Group 5) resistant biotypes
** Suppression only

How to Apply

  • Apply with groundboom equipment only. Do not apply using aerial application equipment.
  • Laudis herbicide can be applied broadcast in a minimum of 100 litres of water per hectare (10 gal./ac.). For weed control in dense weed populations or under adverse growing conditions, 150 to 200 litres of water per hectare is recommended (15 to 20 gal./ac.). Good coverage is essential to achieve optimum weed control.
  • Uniform, thorough spray coverage is important to achieve consistent weed control. Select nozzles and pressure that deliver medium spray droplets as indicated in nozzle manufacturer’s catalogs and in accordance with ASAE Standard S-572. Nozzles that deliver coarse spray droplets may be used to reduce spray drift provided spray volume per hectare (L of water/ha) is increased to maintain coverage of weeds.
  • Flat fan nozzles of 80° or 110° are recommended for optimum post emergence coverage. Do not use nozzles that produce fine (e.g. cone) or extra coarse (e.g. flood jet) spray droplets.
  • Typically, flat-fan nozzles operated at 200-400 kPa will deliver medium spray droplets, providing optimum spray coverage and canopy penetration. Lower pressure operation and/or higher volume flat fan nozzles typically deliver coarse sprays. Refer to nozzle manufacturer catalogs.
  • Boom height should be based on the height of the crop – at least 33 centimeters above the crop canopy
  • Air induction nozzles should be used at or near 550 kPa to produce a medium droplet size
  • Proper agitation should be maintained within the tank to keep the product dispersed

Re-crop Interval

Immediate plant back 3-4 months 10 months 22 months
Field corn
Sweet corn
Winter wheat Potatoes
Soybeans
Spring wheat
Dry beans

Crop Staging

Crop stage at application timing Field corn* Sweet corn*
1 2- to 5-leaf stage 2-leaf stage up to and including the 8-leaf stage
2 Up to and including the 8-leaf stage Do not apply

*Do not apply more than two applications of Laudis herbicide to field corn or more than one application to sweet corn, per growing season

Application Guidelines and Timing, Pre-harvest Application

Weeds Controlled1 Recommended Stage Products Rates
Common lamb’s-quarters Up to 6 leaf-stage Laudis logo

Laudis herbicide plus adjuvant system*

145 mL/ha
(59 mL/ac.)
Giant foxtail2 Up to 2 tillers
Redroot pigweed Velvetleaf Up to 6 leaf-stage
Kochia5 Up to 6 leaf-stage 180 mL/ha
(73 mL/ac.)
Canada fleabane3 Up to 10cm height/diameter 220 mL/ha
(89 mL/ac.)
Common ragweed
Common waterhemp
Giant ragweed
Up to 6 leaf-stage
Green foxtail2 Up to 2 tillers
Wild buckwheat2,4 Up to 6 leaf-stage

1 Includes ALS/SU (Group 2), Auxin (Group 4), Glyphosate (Group 9), PPO (Group 14), and triazine (Group 5) resistant biotypes.
2 Suppression only
3 For improved control of Canada fleabane - field corn only: apply Laudis herbicide in tank-mix with one of the dicamba-containing tank-mix partners. Refer to label for more details.
4 For control of wild buckwheat - field corn only: Laudis herbicide may be tank-mixed with 1.2 L/ha of Aatrex® Liquid 480 Herbicide. Maximum of one (1) application per season. Apply to field corn at the 2- to 5-leaf stage.
5 A minimum of 180 mL/ha is required for season-long control of Kochia. Use higher rate within the labelled rate range of Laudis herbicide for weed control in dense weed populations or under adverse growing conditions.

Application Tips

  • For best results, apply to emerged, young, and actively growing weeds
  • Do not apply more than 2 applications of Laudis herbicide to field corn or more than 1 application to sweet corn, per growing season
  • Laudis requires the use of a Methylated Soybean Oil (MSO) adjuvant
  • Use of a spray-grade liquid nitrogen fertilizer is recommended
  • For ground application:
    • Boom height should be based on the height of the crop – at least 33 centimeters above the crop canopy
    • Apply in a minimum of 100 litres of water per hectare (10 gal./ac.). For weed control in dense weed populations or under adverse growing conditions, 150 to 200 litres of water per hectare (15 to 20 gal./ac.) is recommended.
  • Restricted Entry Interval (REI) is 12 hours
  • Do not apply Laudis herbicide within 45 days of harvesting corn forage
  • Do not graze livestock within 45 days of applying Laudis herbicide

Water Volumes and Tank Mixing

Water Volumes

Laudis herbicide can be applied broadcast in a minimum of 100L/ha (10 gal./ac.) of water. For weed control in dense weed populations or under adverse growing conditions, 150 to 200 L/ha (15 to 20 gal./ac.) of water is recommended. Good coverage is essential to achieve optimum weed control.

Rainfastness

Laudis is rainfast 2 hours after application

Tank Mixing Procedure

Refer to product label

Tank Mix Flexibility

Laudis is an ideal tank-mix partner for:

  • Roundup Transorb® HC liquid herbicide1
  • Roundup WeatherMAX® with Transorb® 2 Technology liquid herbicide1
  • Roundup Xtend® with VaporGrip® Technology1,2
  • XtendiMax® with VaporGrip® Technology2
  • Atrazine
  • Pardner® herbicide

1 Use in corn hybrids with Roundup Ready® 2 Technology only.
2 Do not tank mix these products with UAN or an additional adjuvant.

How to Manage Resistance?

Resistance Management

Laudis herbicide contains an active ingredient from Group 27 which helps manage herbicide resistant weeds. Laudis should be used as part of an integrated pest management system.

Mix Groups

Use tank mixtures with herbicides from a different Group when such use is permitted. To delay resistance, the less resistance-prone partner should control the target weed(s) as effectively as the more resistance-prone partner.

Herbicide use should be based on an integrated weed management program that includes scouting, historical information related to herbicide use and crop rotation, tillage (or other mechanical control methods), cultural (for example, higher crop seeding rates; precision fertilizer application method and timing that favors crop and not weeds), biological (weed-competitive crops or varieties) and other management practices. Weed size should also be considered, as the product is more effective on smaller weeds.

Monitor Weed Populations

After all herbicide applications check weeds in your fields for signs of resistance development (for example, one weed species on the herbicide label may not be controlled). If resistance is suspected, prevent weed seed production in the affected area if possible, by using an alternative herbicide from a different Group. Prevent movement of resistant weed seeds to other fields by cleaning harvesting and tillage equipment when moving between fields, and always plant clean seed. Have suspected resistant weed seeds tested by a qualified laboratory to confirm resistance and identify alternative herbicide options.

Advice

Contact your local extension specialist, certified crop advisor, or Bayer at 1 888-283-6847 for any additional pesticide resistance-management and/or integrated weed-management recommendations for specific crops and weed biotypes.

Laudis Frequently Asked Questions

What are the adjuvant requirements for Laudis corn herbicide?

Adjuvant requirements:

  • Laudis requires the use of a Methylated Soybean Oil (MSO) adjuvant
  • Use of a spray-grade liquid nitrogen fertilizer is recommended
  • A methylated soybean oil MSO (HASTEN™ NT Ultra) 1.75 L/ha – Oil based surfactant may be used. See guidance below.
  • Laudis + atrazine MUST use adjuvant + UAN/AMS
  • Roundup® + Laudis +/- atrazine on non-glyphosate resistant (GR) weeds does not require an adjuvant
  • Roundup + Laudis +/- atrazine on GR weeds requires an adjuvant
  • Roundup Xtend® herbicide with VaporGrip® Technology1 or XtendiMax® herbicide with VaporGrip® Technology + Laudis requires an MSO adjuvant, but DO NOT include UAN/AMS when targeting GR weeds. If no glyphosate resistant (GR) weeds are present, there is no need for an additional adjuvant.

What are best practices for GR weed management with Laudis?

  • For GR weeds such as waterhemp, giant/common ragweed, Laudis alone is very effective, but the addition of another effective mode of action such as atrazine and / or Roundup Xtend or XtendiMax (dicamba) will further improve control and should be used especially for waterhemp management
  • For control of Canada fleabane, adding Roundup Xtend or XtendiMax (dicamba) as a tank mix partner will provide the best control
  • Follow adjuvant + UAN/AMS guidelines and recommendations

Is Laudis a good post emerge option after a pre-emerge application of Converge® XT herbicide or Converge® Flexx or (i.e. using a HPPD pre followed by an HPPD post)?

If using Converge® as a pre-emerge herbicide followed by Laudis post emerge, ensure you have an effective mode of action in both tank mixes for a proper resistance management strategy

Is Laudis included in the Eastern Canada 2021 BayerValue Rewards Program?

Yes, Laudis is part of the Eastern Canada BayerValue™ Rewards Program offer for 2021

Is Laudis registered for use on seed corn?

No, Laudis is currently not registered for use on seed corn at this time. Laudis is registered for use on field and sweet corn.

What is the re-cropping interval for edible beans and white beans?

The re-cropping interval for dry beans is 22 months

What is the application rate of Laudis?

The target application rate is 220 mL/ha (89 mL/ac.)

What are the main weeds that Laudis controls?

Laudis provides excellent control of a number of key broadleaf weeds including velvetleaf, redroot pigweed, lamb’s-quarters and common ragweed. In addition to these weeds, Laudis provides control of GR variants of waterhemp, giant ragweed, Canada fleabane and kochia. Laudis provides suppression of ALS (Group 2) resistant biotype grass species including giant foxtail, green foxtail as well as suppression of wild buckwheat.

I forgot to add an adjuvant. What can I expect from Laudis performance?

The oil-based adjuvant is in the product label to ‘heat up’ the HPPD burn on weeds. If you are tank mixing with Roundup and do not have GR weeds present you will see no efficacy differences because Roundup will control emerged weeds. If GR weeds are present like Canada fleabane or waterhemp you may see reduced control, but you also need to have at least one more tank mix partner like atrazine or XtendiMax in the tank as well for two effective modes of action.

Do I need to add Hasten + UAN (28%) if I’m mixing with glyphosate?

If you’re using Roundup brand products the answer is no; provided you aren’t targeting GR weeds. Roundup brand products have enough built in surfactant already. If you’re using another glyphosate brand you may still want to put in an MSO and UAN (28%) in the tank as Bayer hasn’t tested efficacy with all formulations in the market.

Can I use AMS instead of UAN (28%)?

Yes, these products can be used interchangeably.

Will the UAN (28%) burn my corn?

The UAN (28%) is in the mix to heat up the HPPD efficacy, the built in safener (isoxadifen) will reduce chances for UAN (28%) burn on corn. In most situations you will not see any additional burn from the UAN (28%).

What is the tank mix order for Laudis + adjuvants and its main tank mix partners – Hasten™, UAN (28%), Roundup, Roundup Xtend, etc.?

Add Laudis first and the tank mix partner second (i.e. Roundup, atrazine, etc.). If there is more than one tank mix partner add Roundup last. Next add an oil-based adjuvant and last add the AMS/UAN.

What is the water volume for application of Laudis?

Apply Laudis in a minimum of 100 L/ha (10 gal./ac.) of water. For weed control in dense seed populations or under adverse growing conditions, 150 to 200 L/ha (15 to 20 gal./ac.) of water is recommended.

What is the rainfastness of Laudis?

Laudis is rainfast in 2 hours after application for most weed species

What is the application window for Laudis?

The application window for Laudis is from the 2 to 8 leaf stage. If using Roundup Xtend or XtendiMax as a tank mix partner, the application window is from the 2 to 5 leaf stage.

What are the cropping restrictions?

Laudis is not registered for use on seed corn at this time.

Why does the Laudis label have a treatment per day restriction to 150 ha (370 acre per day)?

The 150 ha (370 ac) treatment per day restriction has been put in place by the PMRA regulatory body. This restriction is to ensure that the acceptable tembotrione exposure to mixers, loaders and applicators is not exceeded. Future label amendments will attempt to address this.

1 Use in corn hybrids with Roundup Ready® 2 Technology only.

Provinces of Registration

  • New Brunswick
  • Newfoundland
  • Nova Scotia
  • Ontario
  • Prince Edward Island
  • Quebec
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