
Unseasonal rains in parts of Brazil have encouraged weed emergence while farmers wait for the end of the dry season before planting 2025/26 soybeans. Producers in Mato Grosso, Mato Grosso do Sul and Goiás are being advised to plan early desiccation and select herbicides based on weed stage and resistance history.
Poor weed control before planting can reduce soybean yield potential, which could tighten supply later in the season. The effect on prices is likely small at this stage.
After 324 past neutral weather events, Soybeans moved a median +0.0% over 5 sessions (52% higher; middle half -1.4% to +1.7%), and +0.7% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.