FAQs

What is Capreno® herbicide?

Capreno® is a postemergence herbicide that controls the toughest grass and broadleaf weeds. Capreno has the longest-lasting residual of any post on the market, leaving fields clean up to canopy.

How does Capreno work?

Capreno uses two sites of action that BOTH effectively control the toughest grass and broadleaf weeds. The first mode of action, commonly known as a bleacher, inhibits the 4-hydroxyphenylpyruvate dioxygenase (HPPD) enzyme in plants. HPPD is key to the production of a plant's protective pigments. By preventing pigment production, plant chlorophyll is destroyed by the sun's ultraviolet rays. The second mode of action is the inhibition of the plant's acetolactate synthase enzyme that prevents weeds from producing three essential branch-chain amino acids. These amino acids are building blocks for normal growth and development that weeds need to survive.

What weeds does Capreno control?

Capreno controls most key grass and broadleaf weeds in corn, including fall panicum, foxtails, barnyardgrass, pigweeds, waterhemp, velvetleaf and lambsquarters, among others. In all, Capreno has demonstrated control of more than 65 grass and broadleaf weeds. See full list.

How do I know Capreno is working?

Weed growth ceases hours after application. The symptoms on susceptible weed species progress from stunted growth to yellowing and bleaching to necrosis. Complete control occurs 7 to 14 days after application. Initial symptoms may also include whitening of the leaf tissue or burning of the weed-leaf margins. The speed of activity varies based on weed size and the environmental conditions following application.

When should Capreno be applied?

Capreno can be applied to corn from pre-emergence through the V6 growth stages. For maximum corn yield, spray weeds before they reach 4 inches in height. While larger weeds can be controlled with Capreno, earlier application will result in better protection of the crop yield from weed competition. See product label for more information.

What is the use rate?

Capreno can be applied alone at 3 fl oz/A for broad-spectrum grass and broadleaf weed control, and at 2 fl oz/A when applied with Liberty® herbicide. The low use rate means there's less product to handle, it's easier to ship, it takes less room to store and there aren't as many jugs.

What are the recommended tankmix partners?

The most common recommended tankmix partners include atrazine, Liberty (on LibertyLink® hybrids) and glyphosate. Atrazine, at as little as 0.5 lb AI/A, increases the speed, spectrum and consistency of the weed control. When applying Capreno with Liberty or glyphosate, use adjuvants recommended for the respective systems. The tankmixes will enhance control of large, stressed, tolerant, resistant or otherwise difficult-to-control weeds and add to residual weed control.

How long will the residual weed control last?

Depending on application timing and weather conditions, Capreno provides residual control of key grass and broadleaf weeds up to crop canopy formation. Under normal growing conditions, a properly timed application of Capreno provides season-long control of weed competition.

Does Capreno need any adjuvants or surfactants?

Yes. Capreno applied alone requires an adjuvant system of surfactant and fertilizer for optimum weed control. Use Crop Oil Concentrate (COC) at 1 gallon per 100 gallons of water (1% v/v), with a minimum of 1.25 pt/A. COC should contain at least 80 percent Crop Oil and 10 percent emulsifier or greater. The use of adjuvants such as non-ionic surfactants or refined vegetable oils will result in unacceptable or erratic weed control. Use 1.5 qt/A of a high-quality urea ammonium nitrate (UAN) or 1.5 lb/A or 8.5 lb per 100 gallons with a minimum of 1.5 lb/A of a spray grade ammonium sulfate (AMS). Use UAN under conditions of low relative humidity for greater weed control. Adjuvant systems should be used when Capreno is applied in tankmixes with herbicides such as atrazine, Liberty, glyphosate and Buctril® herbicide. Refer to the Capreno label for recommended adjuvant systems.

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

A maximum application rate of up to 3 fl oz/A can be made twice in a single growing season for a seasonal total of 6 fl oz/A of Capreno herbicide. Applications must be at least 14 days apart.

Is Capreno safe to the crop?

The Capreno formulation contains a safener that contributes to broad compatibility of the herbicide with popular field corn hybrids. Growers should carefully determine the corn growth stages before application because lower leaves can slough off as the corn approaches the 5 leaf-collar growth stage (V5). Follow all precautions and warnings for using ALS-inhibiting or sulfonylurea herbicides on a particular hybrid. Capreno is registered with "Caution" as the signal word on the label.

What are the crop rotation restrictions?

Field corn can be replanted immediately. Wheat can be planted 4 months after Capreno application, while soybeans and several other crops can be planted after 10 months. Certain sensitive crops and those with unknown reactions to Capreno can be planted after 18 months.

Is carryover a concern with Capreno?

Crops such as wheat and soybean have not demonstrated unusual sensitivity in the season following Capreno use. Certain crops, such as sugar beets, that are sensitive to the components in Capreno, will have longer rotational intervals after use of Capreno herbicide. Plant-back intervals specific to various crops are outlined in greater detail on the Capreno label.

Are there any insecticide interactions?

Capreno is available to use with Poncho®/VOTiVO® seed treatment or Aztec® soil-applied insecticide. Other organophosphate or carbamate insecticides should not be soil-applied ahead of Capreno applications. In addition, Capreno herbicide is available for use with Baythroid® XL insecticide or Oberon® miticide/insecticide, but should not be tankmixed with any organophosphate and carbamate insecticides. Foliar applications of organophosphate and carbamate insecticides should be separated from Capreno applications by a minimum of 7 days.

What is the rainfastness?

Capreno 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.

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