Syngenta will market a new herbicide similar to Lumax that is targeted at the southern Corn Belt. The herbicide, called Lexar, recently received EPA registration for sale and use in the United States and will be available for the 2005 growing season. Syngenta plans to launch the new product in the central and southern Corn Belt market. The company received approval for use of the new herbicide on field corn, field production seed corn, silage corn and yellow popcorn.

Lexar is a bulk product with three active ingredients to ensure a broad-spectrum, consistent control of annual broadleaf weeds and grasses in corn. It combines S-metolachlor and atrazine with mesotrione, the active ingredient in Callisto. Syngenta claims the combination of the three ingredients provides season-long control of major weeds and grasses — including velvetleaf, waterhemp, common ragweed, foxtail, lambsquarter, pigweed, smartweed, nightshade, crabgrass and jimsonweed — in one application.

More atrazine

According to the company, southern cornfields with heavy weed pressure from giant ragweed, morningglory, sunflower and cocklebur will receive solid control from Lexar because it contains a higher rate of atrazine than Lumax, which was developed for the northern Corn Belt.

The herbicide may be applied from 14 days pre-plant through 12 in. tall. However, it must be applied before weed emergence to provide maximum weed control. It was designed to provide residual control up to six weeks from time of application.

Syngenta reports that the product manages weeds early when yield loss occurs. This is at the 2- to 4-in.-high stage. “Weeds that start out with the crop are the most damaging,” reports Mike Johnson, Syngenta technical brand manager. “Lexar cuts these weeds off early.”

Application

The herbicide is applied at a rate of 3 qt./acre on soils with less than 3% organic matter and at a rate of 3.5 qt./acre on soils with more than 3% organic matter. It will be sold in a liquid formulation and may be tank mixed with a range of products, including Accent, Basis, Touchdown brands, Roundup brands, Gramoxone Max, Gramoxone Extra, AAtrex 4L, Nine-O, Steadfast, Princep, Caliber 90 and Warrior.

All types of corn, sorghum, cereals, soybeans, peanuts and cotton may be planted the following season after Lexar has been applied. Other crops require an 18-month interval between planting and Lexar use.

Cruiser for soybeans

Syngenta's Cruiser seed treatment may soon be available for use in soybeans. The company anticipates receiving registration of CruiserMaxx Pak for soybeans for the 2005 growing season. The product will be used with ApronMaxx brand seed treatment fungicide, including the new Rhizobia-friendly ApronMaxx RFC, which also has registration pending.

According to the company, CruiserMaxx Pak will protect against soybean aphid, bean leaf beetle, seedcorn maggot and wireworm, as well as damping off and seed rots due to Pythium, Fusarium, Rhizoctonia, early-season Phytophthora root rot, Phomopsis and seedborne Sclerotinia.

Syngenta says CruiserMaxx Pak helps protect the high investment in soybean seed by improving stand and vigor.

Cruiser has been used as an insecticide seed treatment on crops such as corn, sorghum, wheat, barley and canola.

Syngenta also is seeking registration for an additional Cruiser seed treatment combination for corn. Called Cruiser Extreme Pak, it combines Cruiser seed treatment insecticide and Maxim XL, Apron XL and Dynasty seed treatment fungicides. The company anticipates registration in time for the 2006 planting season.