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Laudis® Takes Weed Control To A New Level
Upon registration, Laudis herbicide will offer corn growers outstanding postemergence control of the toughest grass and broadleaf weeds, including weeds resistant to glyphosate and other chemical classes. Laudis will deliver unmatched crop safety and maximum rotation flexibility to soybeans and many other common rotation crops. www.BayerGrowingStrong.com and soybean crop protection portfolio.
Q. What is Laudis™ herbicide?
A. Laudis is a new systemic herbicide that provides postemergence control of grass and broadleaf weeds in all corn. Laudis combines a new active ingredient a highly effective safener allowing for exceptional safety and flexibility on all types of corn. Laudis is formulated as a liquid suspension concentrate with 3.5 lbs of active ingredient per gallon.
Q. What crops can be treated with Laudis?
A. Laudis has exhibited excellent weed control and crop safety on all types of corn, including sweet corn, popcorn, field corn and inbreds used in seed production.
Q. What is the mode of action?
A. Laudis is a bleacher. It is a triketone herbicide that will inhibit 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.
Q. What weeds does Laudis control?
A. Laudis is unique in that it will control both grass and broadleaf weeds, yet can be used on all types of corn. Key broadleaf weeds controlled with Laudis will include: Pigweeds, tall and common waterhemp, giant and common ragweed,
common lambsquarters, velvetleaf, sunflower, nightshades and common cocklebur. This includes weeds with known resistance or tolerance to glyphosate, triazine, dicamba (growth regulant) and ALS modes of action. Grass weeds controlled will in 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 weeds controlled or suppressed.
Q. What are the symptoms of Laudis activity on weeds?
A. 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 seven days of application. The speed of activity varies based on the environmental conditions following the application.
Q. Is Laudis safe to the crop?
A. Laudis provides unequalled crop safety in all types of corn. Crop tolerance to Laudis surpasses other herbicides within the same chemical family, as well as phenoxy and SU chemistries. Hybrid field corn, popcorn and inbred field corn have shown no sensitivity to Laudis. The vast majority of sweet corn hybrids have also shown excellent tolerance.
Q. What is the use rate?
A. Laudis is used at 3 fl oz/A for broad-spectrum grass and broadleaf weed control and at 2 fl oz/A when applied with Liberty® herbicide.
Q. What is the application timing for Laudis?
A. Laudis may be applied to corn from crop emergence up to the V-8 growth stage (eight emerged leaf collars), V-7 for sweet corn. For maximum corn yields, it is important to remove weed competition before they 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.
Q. How should Laudis be applied?
A. Laudis activity is primarily through foliar uptake but also has 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.
Q. Does Laudis need any adjuvants or surfactants?
A. Yes. Crop oil or methylated seed oil (MSO) concentrates containing a minimum of 10% emulsifiers should be used at 1% v/v with the spray volume. A high quality ammonium nitrogen fertilizer such as UAN at 1.5 qt/A or AMS at 8.5 lbs/100 gal is also required. The selection of crop oil concentrate (COC) or MSO is dependent on tankmix partners chosen and the target weeds. Any adjuvants not meeting these standards may result in unacceptable or erratic weed control.
Q. What are the recommended tankmix partners?
A. The most common tankmix partners that are recommended 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. When atrazine is in the tank, COC may be used as part of the adjuvant system. 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-tocontrol weeds in these herbicide tolerant systems.
Q. How long does the residual weed control last?
A. Laudis provides early season residual control of key broadleaf weeds and grasses. Under normal growing conditions, a properly timed application of Laudis keeps the crop clean until the canopy forms.
Q. What is the rainfastness?
A. Laudis is rapidly absorbed onto the plant tissue and is rainfast within 1 hour of application. Rainfall within an hour after application may result in poor weed control.
Q. Is carryover a concern with Laudis?
A. 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.
Q. Are there any weed populations resistant to this chemistry?
A. No. While there has been much news made of weeds becoming resistant to other herbicide chemistries such as glyphosate or ALS inhibitors, none have been identified as resistant to HPPD herbicides. Laudis is a valuable tool in controlling known populations of resistant weeds and in maintaining the utility of other chemistries.
Q. What is the maximum amount of Laudis that can be applied in one year?
A. For Sweet corn, one application of up to 3 fl oz per year. For all other corn, a maximum of 6 fl oz of Laudis herbicide may be applied per growing season. Applications should be at least 14 days apart.
Q. What is the signal word on the Laudis label?
A. The signal word is CAUTION. Laudis should not be considered a restricted use pesticide.
Q. Are there any insecticide interactions?
A. 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.
Q. Is the safener also active on other chemistries?
A. Yes. This proprietary safener has been shown to improve crop tolerance to dicamba, Accent®, Steadfast® and other HPPD herbicides.
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Laudis - Powerful Grass and Broadleaf Control with Unmatched Crop Safety