13November 2026, Brasília, BR: Brazil’s Ministry of Agriculture and Livestock (Mapa) has canceled a group of pending registration requests for several widely used pesticide active ingredients, including dicamba, methomyl, thiamethoxam and abamectin, as part of a broader act of post-registration administrative decisions published this week.
The decisions are contained in Ato nº 70, dated November 4, 2026, and published in the Diário Oficial da União on November 10 by Mapa’s Department of Plant Health and Agricultural Inputs. The act does not grant new product approvals. Instead, it covers a batch of post-registration procedures, a category of administrative actions that Brazilian regulators use to process changes to products that are already registered or under review, separate from the approval of entirely new pesticides.
Among the items in the act, Mapa formally closed out registration requests that had been pending for dicamba, methomyl (sold under the generic name metomil in Brazil), thiamethoxam (tiametoxam) and abamectin (abamectina), along with requests tied to several other technical-grade active ingredients. Closing a pending request of this kind means the specific application is no longer under review. It does not amount to a ban on the ingredient, and it does not affect products containing these active ingredients that are already registered and sold in Brazil under separate approvals.
Import authorizations move forward for trading houses
Elsewhere in the same act, Mapa advanced import authorizations for several multinational trading and formulation companies operating in Brazil’s agricultural input market. Cargill Agrícola, Louis Dreyfus Company Brasil, Albaugh Agro Brasil, UPL and Bayer were named among the companies granted authorization to import various formulated or technical-grade pesticide products. Albaugh’s authorizations covered technical products based on imidacloprid and acetamiprid, two widely used neonicotinoid insecticides. The act also recorded the inclusion of overseas formulating plants tied to existing Brazilian registrations, with manufacturing sites located mainly in China, alongside others in the United Kingdom and India.
The act also updated the registration of a biological fungicide built on the fungal agent Trichoderma harzianum, used against white mold (Sclerotinia sclerotiorum) in crops including soybeans, beans, potatoes and tomatoes. The update raised the minimum required concentration of the active organism, lowered the recommended application dose for white mold control and added aerial application to the product’s approved use pattern.
Post-registration acts of this kind are issued periodically by Mapa and typically bundle together a wide range of administrative matters: changes of commercial brand names, transfers of registration ownership between companies, the addition of new manufacturers or formulators to existing registrations, import authorizations, formulation changes and the cancellation or withdrawal of pending applications. Because they combine many unrelated administrative actions in a single document, the number of items in any given act does not correspond to the number of new products reaching the market, and Brazilian trade analysts who track these publications routinely caution against treating the total item count as a measure of new registration activity.
The cancellations affecting dicamba, methomyl, thiamethoxam and abamectin apply specifically to the pending applications named in the act. Separate, already-approved registrations for products containing these same active ingredients, submitted by other companies or through other application processes, are not covered by this cancellation and remain valid under Brazil’s existing pesticide rules.
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