Corteva Launches Majesty Insecticide for Brazil Stink Bugs

13 November 2026, São Paulo, BR: Corteva Agriscience has launched Majesty, a dual-active insecticide for soybean and corn growers in Brazil, aimed at stink bug populations that can erode yields heading into the 2026/27 planting season. The product pairs Isoclast Active, a sulfoximine-class compound, with bifenthrin, a pyrethroid, so growers can address both immature and adult stages of the pest in a single application.

Isoclast Active is systemic and translaminar, giving it strong activity against nymphs, the immature stage of stink bugs. Corteva said the ingredient is selective toward natural enemies of the pest, a property the company links to integrated pest management programs that rely on beneficial insects to help keep secondary pests such as whitefly in check. Bifenthrin contributes a faster knockdown effect against adult insects and, according to the company, offers greater leaf retention along with photostability and thermostability suited to Brazil’s tropical field conditions, where heat and rainfall can shorten the residual window of some insecticides.

Combining the two modes of action in one product is intended to help growers manage resistance by addressing both life stages of the pest rather than relying on a single chemistry applied repeatedly across a season. Corteva positions Isoclast Active as a resistance management tool in its own right, given that stink bug populations in Brazil have faced years of pressure from a narrower set of active ingredients, mainly pyrethroids and organophosphates, across successive soybean and corn cycles.

On soybean, Majesty’s label covers the brown stink bug (Euschistus heros) and whitefly (Bemisia tabaci), a sap-feeding pest that can also transmit plant viruses. On corn, it targets the green-belly stink bug (Dichelops melacanthus), one of several stink bug species that attack young corn plants early in the season. The product is also registered for use in cotton, citrus, melon, tomato, wheat and beans, broadening the range of cropping systems where growers can use the same formulation, though Corteva has not detailed specific pest claims for those additional crops.

Pest pressure behind the launch

Corteva said the launch responds to persistent stink bug pressure in Brazilian soybean fields. Thomas Scott, the company’s insecticide and nematicide portfolio leader for Brazil and Paraguay, said stink bug attacks can cut soybean yields by as much as 30 percent, a figure he attributed to Embrapa, Brazil’s agricultural research corporation, and said nymphs account for roughly 70 percent of that damage.

According to Scott, stink bug eggs take about seven days on average to develop into nymphs. The insects begin colonizing soybean fields as flowering starts, and population growth accelerates once the first pods appear and food availability increases. Nymphs feeding on pods and grains can cause abortion, while bites that reach the cotyledon can damage the embryo, reducing seed vigor and germination and creating entry points for fungal and other pathogens. Damage from the pest complex is cumulative across the reproductive stages, which is why Corteva is positioning Majesty as a season-long tool rather than a single rescue treatment.

“There is no room for error in management,” Scott said. Corteva is advising growers to scout fields regularly, since stink bugs typically migrate into soybean from neighboring areas, forested land or other crops. That movement can begin late in the vegetative period and intensifies once plants enter the reproductive phase, when pods become available as a food source.

Registration and availability

Majesty has cleared federal and state-level regulatory review in Brazil. Parana’s state agricultural defense agency, Adapar, included the product in its registration records in October 2026, pointing to active state-by-state clearance alongside federal approval. Corteva said Majesty is already available to growers for the 2026/27 season, which covers soybean and first-crop corn planting across the country’s main producing states in the center-west, south and southeast.

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