While there are no new herbicide modes of action for corn, cotton and soybean fields, there are new herbicide products on the market. New premixes or revised formulations of existing active ingredients that could provide growers additional options as they track down weed control products in a market with very tight supply.
Tendovo
Tendovo is a new preemergence herbicide from Syngenta approved for use in soybeans.
“With three sites of action, Tendovo combines metribuzin, which is great on Palmer amaranth and waterhemp; it has an enhanced rate of s-metolachlor, which will provided good residual on grasses and amaranthus species; then, it has cloransulam-methyl, a Group 2 herbicide which is excellent on large-seeded broadleaf weeds, like ragweed, morningglory and sicklepod. It fills the gap for weeds that peek through those glyphosate systems,” said Pete Eure, herbicide technical lead at Syngenta.
For season long weed control, Eure recommends using Tendovo preemergence in a planned two-pass program. Eure said supply would be limited in 2022.
“We’ll have some first look experiences to allow customers to have a chance to see the product this year. Tendovo will be more widely available in 2023,” he added.
Trivolt
Trivolt is Bayer’s new herbicide premix for corn that received EPA registration in March. TriVolt contains three different active ingredients: thiencarbazone, flufenacet and isoxaflutole from Groups 2, 15 and 27 herbicides, respectively. Bayer claims this proprietary combination provides burndown and residual activity for up to 8 weeks through a variety of weather conditions and can be tank-mixed with atrazine to help combat troublesome grass and broadleaf weeds, such as waterhemp and Palmer amaranth.
“Keeping fields weed-free is the key to a successful weed management program and maximizing yield at the end of the season, so it is critical to start clean and stay clean throughout the growing season,” said Robert Schrick, crop protection business Lleader with Bayer.
Recommended application timing for TriVolt is at preplant, pre-emergence/at planting with flexibility to be applied at early post-emergence.
Resicore XL
As of press time, Resicore XL from Corteva is still awaiting EPA approval. Although Corteva representatives are hopeful to bring the product to farmers in 2022, they are most likely looking at a 2023 release. Resicore XL is a pre-plant, preemergence and postemergence corn herbicide, that also contains three active ingredients with three modes of action: acetochlor from Group 15, mesotrione from Group 27 and clopyralid from Group 4.
“Resicore XL will provide a strong residual for early weeds. This product also boasts a wider application window, with post applications on corn greater than 11 inches tall. It has greater tank mix compatibility and by encapsulating the acetochlor, we don’t see crop response after application,” said Ron Geis, crop protection market development specialist at Corteva.
Rogue
Rogue brings a brand-new mode of action to rice fields in the Midsouth. The active ingredient in Rogue SC is benzobicyclon. An oversimplified explanation of how the product works is that when benzobicyclon is applied to a flooded rice field, it converts to an HPPD inhibiting herbicide that affects pigment synthesis in the targeted weeds. This process results in bleaching, growth reductions and, eventually plant death.
Water is necessary to activate the herbicide. In fact, Rogue is only active in floodwater and has no herbicidal activity when applied to soil or plant foliage. It was specifically created for use in rice and has no fit in any other crop.
Because of the novel nature of the herbicide, applicators are strongly encouraged to complete an online training and certification before using the product. The training can be found on Gowan’s website. (gowanco.com/rogue-sc) Certified Crop Advisors will earn 0.5 CEUs in Soil and Water Management upon completion.
Smart sprayers
New sprayer technology will also help producers conserve product and manage resistance. John Deere’s See and Spray Ultimate offers in-crop weed control for corn, soybeans and cotton using both targeted technologies combined with the option for broadcast spraying.
“We have a two-tank sprayer design,” says Kaylene Ballesteros, product marketing manager, sprayers, John Deere. “One can be used through the See & Spray system and the other for broadcast application.”
That approach keeps the sprayer from being a single-purpose machine. A farmer can use the sprayer throughout the season, engaging the See & Spray spot system only as needed. It also offers the opportunity to carry products on board that may be antagonistic in a tank mix but be available in a one-pass application. “We’re working with farmers to help control herbicide resistant weeds,” Ballesteros adds.
The factory-installed system is available for 2023 in three sprayer models.
BASF has partnered with Bosch to create their own version of a targeted weed sprayer.
The Smart Spraying solution offers real-time, automated pre-emergence (“green-on-brown”) and post-emergence (“green-on-green”) weed identification and management day and night. Combining Bosch’s high-tech camera sensor technology and software with xarvio’s agronomic intelligence enables Smart Spraying in milliseconds to precisely detect weeds in crop rows and to spot apply herbicide only where needed. Its unique configuration supports a more efficient use of herbicide, with trials showing herbicide volume savings of 70% are achievable said Matt Leininger, managing director North America, Bosch BASF Smart Farming.
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