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Callisto: an excellent tank-mix partner for residual, broadleaf weed control in glyphosate-tolerant corn

Over the past few years, planting corn hybrids with the glyphosate-tolerant trait (Agrisure® GT or Roundup Ready®) and using glyphosate for weed control has become the standard in corn production. But while glyphosate is a valuable tool, it is too risky to rely on glyphosate alone.

  • Glyphosate provides no residual control, so many weeds continue to germinate, therefore reducing corn yield potential.
  • Glyphosate will not control glyphosate-resistant weeds and also increases the risk for glyphosate-resistant weeds to develop.

That’s why many choose to add another product to the tank. But all post-emergence herbicide tank-mix partners are not created equally. With several new products entering the marketplace in the last couple of years, it is important to understand the key differences between Callisto® corn herbicide and newer offerings like Laudis®, Status® and Impact® herbicides.

The bottom line is Laudis, Impact and Status cannot claim the level of original and residual broadleaf weed control delivered by Callisto. That’s why in corn, Callisto is an excellent tank-mix partner for glyphosate herbicides, including Touchdown® and Roundup® brands. With the longest-lasting residual broadleaf weed control, consistent performance, proven crop safety and flexibility, Callisto remains in a league of its own.

Callisto vs. Laudis Callisto vs. Impact® Callisto vs. Status®

Callisto vs. Laudis

Laudis® corn herbicide entered the market claiming “superior grass control compared to Callisto,” but when growers put it to the test in their fields, many found the grass control of Laudis was not what they expected, and the promise of superior control was not what they experienced.

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Callisto vs. Laudis - Residual Control

Callisto delivers excellent upfront control and longer-lasting residual broadleaf weed control than tembotrione-based Laudis.


Comparison photos showing the superior residual broadleaf weed control of Callisto
Comparison photos showing the superior residual broadleaf weed control of Callisto (28 days after treatment)

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Callisto vs. Laudis - Broadleaf weed control performance

Bottom Line: Even though Laudis was positioned as a “Callisto-like herbicide,” the performance of Callisto is unmatched. The residual broadleaf weed control of Callisto consistently outperforms Laudis. University trials support this finding.

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Callisto vs. Impact

Impact® corn herbicide is touted for its ability to “torch tough-to-control glyphosate-tolerant broadleaf and grass weeds.” But weed control is different than weed management.

Callisto provides excellent burndown plus the longest-lasting residual control of the toughest broadleaf weeds, including waterhemp, lambsquarters, ragweed and pigweeds, which results in season-long weed management that helps protect each hybrid’s yield potential.

Callisto also offers a more flexible application window (pre-emergence through post-emergence) than Impact (post-emergence only). The longer-lasting residual control and wider application window of Callisto can’t be beat.

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Callisto vs. Impact

Comparison photos showing the superior residual broadleaf weed control of Callisto
Comparison photos showing the superior residual broadleaf weed control of Callisto (28 days after treatment)

Bottom Line: Impact can’t claim long-lasting residual weed control and a flexible application window like Callisto.

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Callisto vs. Status

Dicamba-containing brands like Status® herbicide are no match for the excellent crop safety, long-lasting residual broadleaf weed control, consistent performance and convenience of Callisto. Plus, 2006 university trials across six states showed an actual yield loss when Status was added to glyphosate vs. glyphosate alone.

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Callisto vs. Status
Glyphosate was applied at local recommended rates.

When it comes to crop safety, regardless of the formulation of dicamba (Status, Banvel®, Distinct®, or Clarity® herbicides), the potential for injury to corn and soybeans still exists. Callisto has a low vapor pressure, does not move off-target via volatility and is safer to corn. That’s why Callisto is widely adopted by seed corn, yellow popcorn and sweet corn producers.

Dicamba Injury to CornDicamba Injury to CornDicamba Injury to Corn
Dicamba Injury to Corn
Pictures (L to R): potential root fusing caused by early post-emergence applications of dicamba; potential impact of dicamba on brace root formation, which can impact standability; corn field treated with dicamba followed by a windstorm four days after application, Lincoln, Ill.

Dicamba Injury to SoybeansDicamba Injury to SoybeansDicamba Injury to Soybeans
Dicamba Injury to Soybeans
Pictures (L to R): Soybean leaf cupping, leaf necrosis, and stem swelling – all three common symptoms of dicamba drift injury on soybeans.

In addition to crop safety, Callisto provides longer-lasting residual broadleaf weed control than dicamba-containing brands.

Comparison photos showing the superior residual broadleaf weed control of Callisto
Comparison photos showing the superior residual broadleaf weed control of Callisto (28 days after treatment)

Bottom Line: Dicamba-containing brands are known for their crop safety issues. If your customers experience crop injury and/or yield loss, the price per acre will be long forgotten. Callisto is safer to the crop, provides long-lasting residual broadleaf weed control and consistent performance.

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