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Weapons Against Weeds

New Herbicides for corn and soybeans will be available this year, increasing growers' options for preemergence and postemergence control. Some new seed treatment products also will be available, and additional insect control products will hit the market in 2009.


Endigo ZC from Syngenta is a broad-spectrum foliar insecticide registered for soybeans, containing the same active ingredients as Warrior (lambda-cyhalothrin) and Cruiser (thiamethoxam). According to the company, it provides greater than 90% control of most common soybean pests, including soybean aphids and bean leaf beetles. Two modes of action offer knockdown and residual control. Endigo was sold in southern soybean states in 2008 and will have limited release for large field plots in the Midwest this year, with broad availability in 2010.

Flexstar GT is a postemergence herbicide for use in glyphosate-tolerant soybeans. It combines the active ingredients of Flexstar (fomesafen) and Touchdown (glyphosate) for two distinct modes of action to help control weeds that are difficult to control with glyphosate-only products or that have developed, or are likely to develop, resistance to glyphosate and/or acetolactate synthase (ALS) inhibitors. Syngenta has submitted the Flexstar GT Section 3 registration package to the EPA and expects the product to be available for the 2009 selling season, pending federal and state registration.


Authority Assist is a soybean herbicide premix (sulfentrazone and imazethapyr) for residual control of broadleaf weeds and grass control assistance. It is labeled for control of a variety of weeds. FMC says that the product's dual mode of action provides more complete residual control of tough weeds and grasses and widens the window of application for the post-emergence application.

For selective postemergence control of broadleaf weeds in corn and soybeans, FMC has Cadet herbicide (fluthiacet-methyl). The company states that Cadet is an effective tankmix partner with a variety of other herbicides (including glyphosate) and controls velvetleaf, pigweed, lambsquarters, waterhemp and nightshade.

Dow AgroSciences

Lorsban insecticide is available in a new formulation called Lorsban Advanced (chlorpyrifos), which is a low-odor, water-based formulation. Dow claims that the new product offers efficacy, quick knockdown and residual control and retains compatibility with insecticides, miticides, fungicides and non-pressure fertilizer solutions (except alkaline materials). It has the same application rates and methods of its predecessor: Lorsban-4E.


Valor (flumioxazin) can now be used 14 days prior to field corn emergence in no-till or minimum-tillage operations. Valor is the first PPO (protoporphyrinogen oxidase) herbicide for field corn, with a new mode of action for controlling such broadleaf weeds as common ragweed, lambsquarters, marestail, Palmer pigweed and waterhemp. Additionally, Valent points to Valor's rotational flexibility as important for farmers who want the option to make last-minute planting changes.

For farmers facing replants, Select Max (clethodim) is now labeled to control Roundup Ready corn in replant situations. Select Max also is used to control volunteer corn appearing in regular season soybean crops.


BASF Crop Protection is developing a new herbicide called Kixor (saflufenacil) and anticipates registration late this year. The company has conducted research with Kixor on more than 90 broadleaf weeds in 106 different crops, including corn and soybeans. It was tested for preplant burndown and residual weed control. According to BASF, Kixor is absorbed by the weed's roots, shoots and leaves and then translocated throughout the weed. The result is rapid burndown of the weed's leaves and soil residual activity.

Stamina is a fungicide seed treatment for corn that contains F500, the same active ingredient that is in Headline fungicide. Stamina was shown to protect seedlings against Rhizoctonia root rot. Research trials also demonstrated activity of Stamina against Fusarium species that cause seed and seedling rot and seedling blight and certain Pythium species.


Chemtura claims that its new Enhance AW (carboxin, captan and imidacloprid) offers broad-spectrum preventative seed and seedling disease protection for cereals, dry beans and soybeans against seedborne fungi and seedling damping off and provides early season protection against insects, including aphid and wireworm.

Rancona 3.8 FS seed treatment (ipconazole) is designed for dealer application to ensure proper coverage of this concentrated product on the seed. It provides both systemic and contact activity against key soilborne and seedborne diseases.

Rancona Apex seed treatment (ipconazole) is a microdispersion formulation specifically designed for cereal crops. As a “ready to use” product, it is suited for grower as well as dealer application. It provides both systemic and contact activity against key soilborne and seedborne diseases.


Enlite and Envive herbicides provide two modes of action for residual and contact control in soybeans. They contain the active ingredients of chlorimuron, flumioxazin and thifensulfuron for control of winter annuals, dandelion, lambsquarters and other glyphosate-tolerant or ALS-tolerant weeds. Both can be applied in the early spring following ground thaw up to three days after planting and can be used alone or tank mixed with products such as glyphosate. Enlite is better suited to northern areas and higher pH soils.

Resolve Q (rimsulfuron and thifensulfuron) is a premix for postemergence application in corn for control of many grass and broadleaf weeds, including morningglory, common lambsquarters and velvetleaf. Dupont says that the product's built-in safener technology provides the flexibility to apply Resolve Q herbicide under more diverse weather conditions, across more hybrids and with a wider range of adjuvants.


Leverage 2.7SE insecticide (imidacloprid and cyfluthrin) features two modes of action for knockdown and residual control of sucking and chewing pests in soybeans, including soybean aphid, bean leaf beetle, Japanese beetle and corn rootworm beetle.

Bayer says that Poncho 500, the newest member of the Poncho family, offers corn producers improved control of wireworm, black cutworm and other insects.

The company claims that its Belt SC insecticide (flubendiamide) provides knockdown and residual control of lepidopteran pests in corn. Belt's active ingredient comes from a new chemical class, the phthalic acid diamidies, with a mode of action that acts differently than conventional materials against target pests.

Ignite 280 SL herbicide (glufosinate) controls more than 120 broadleaf weeds and grasses, according to Bayer. Registered for use over crops with the LibertyLink trait, growers have similar benefits of glyphosate-tolerant systems and the added benefit of a unique mode of action to combat glyphosate- and ALS-resistant weeds. Ignite can be tank mixed with most other crop protection products, including complementary residual herbicides.

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