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Indoxacarb, the active ingredient in DuPont Steward insecticide, is a broad-spectrum lepidoptera insecticide that also has activity on selected other pests.
The major insect pests controlled by Steward include many lepidopteran pests such as species of budworms, armyworms, cutworms, loopers, and cloverworms. In addition to controlling numerous other lepidopteran species, Steward also controls selected sucking insect pests including fleahoppers and tarnished plant bug.
Indoxacarb represents a new class of insecticides — the oxidiazines — and is designated by the United States Environmental Protection Agency as a “reduced-risk” pesticide. The EPA defines a reduced risk pesticide as having one or more of the following advantages over existing products: low impact on human health, low toxicity to non-target organisms (birds, fish and plants), low potential for groundwater contamination, lower use rates, low pest resistance potential and compatibility with Integrated Pest

Management programs.
The primary route of entry into target insects is through ingestion, although the product also is absorbed through the cuticle. Steward has a novel mode of action that blocks the movement of sodium ions into certain nerve cell ion channels, resulting in paralysis and death of the pest species. Steward typically provides excellent crop protection for 5 to 14 days. Inhibition of insect feeding occurs very rapidly resulting in quick crop protection. Pest knockdown usually occurs within 1 to 3 days. Steward has an excellent toxicological and ecotoxicological profile. Low use rates reduce environmental loading, particularly when compared to
organophosphates (OPs) and carbamates. Steward also has relatively low toxicity to mammals and birds when used in accordance with the labels. The novel mode of action and its minimal impact on beneficial insects and mites makes Steward an excellent choice for Insecticide Resistance Management and Integrated
Pest Management programs.

KEY CHARACTERISTICS OF DUPONT STEWARD
■ Broad-spectrum lepidopteran insecticide that also controls other insect pests including alfalfa weevil larvae, Egyptian alfalfa weevil larvae, cotton fleahopper and tarnished plant bug.
■ Steward is used primarily as a larvicide. It also has activity on eggs (ovilarvicidal) and adults of many insect pest species.
■ Novel mode of action; useful in insecticide resistance management programs.
■ Excellent crop safety on all targeted crops.
■ Favorable comparative environmental and ecological profile; minimal impact to beneficial insects and mites.
■ Steward is resistant to washoff by rainfall or overhead irrigation.
■ Exhibits excellent ultraviolet and spray tank stability and unlike some insecticides has a positive temperature correlation providing consistency of control and residual activity