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Cruiser Seed Treatment Receives Approval for Use

November 1, 2002
Cruiser (active ingredient thiamethoxam), a seed treatment that has been under development by Syngenta Crop Protection, Inc., recently received approval from the EPA for use on corn. This nicotinoid insecticide, which is related to imidacloprid (active ingredient of Gaucho and Prescribe), is registered for use on field, pop, seed, and sweet corn. The rates applied to corn seed will be a minimum of 0.125 mg of thiamethoxam per kernel to a maximum of 0.8 mg (field, pop, seed, and sweet corn) or 1.4 mg (field corn only) of thiamethoxam per kernel.

Depending on the rate of application, Cruiser is intended to provide early-season protection of seedlings against injury by chinch bug, flea beetles, seedcorn maggot, southern corn leaf beetle, white grubs, and wireworms. The label also claims suppression of cutworms at all rates of application. The higher rates of application (1.125 to 1.4 mg of thiamethoxam per kernel, for field corn only) are intended to provide corn rootworm protection in light to moderate infestations and suppression of cutworms. The performance of Cruiser against corn rootworms in insecticide efficacy trials has been similar to the performance of Prescribe. Efficacy data regarding control of the other insects listed on the label are not abundant.

Like imidacloprid, thiamethoxam is systemic. However, thiamethoxam is significantly more water soluble than imidacloprid, which can be a boon or a bane, depending on environmental and soil conditions.

Commercialization of Cruiser will make the seed-treatment market more competitive. At 0.125 mg of thiamethoxam per seed, Cruiser will compete with Gaucho. At 1.25 to 1.4 mg of thiamethoxam per seed, Cruiser will compete with Prescribe. However, the availability of corn hybrids treated with Cruiser has not been determined.

For more information about Cruiser, contact your local Syngenta representative or Syngenta Crop Protection, Inc., P.O. Box 18300, Greensboro, NC 27419; telephone (336) 632-6000.--Kevin Steffey

Author: Kevin Steffey

The Pest Management and Crop Development Bulletin
Executive Editor: Kevin Steffey, Extension Entomologist

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