RS Harvest 2024/25: drought affects soybeans

Phytosanitary problems also intensify

16.01.2025 | 16:55 (UTC -3)
Cultivar Magazine

Rio Grande do Sul is facing a period of low relative humidity and uneven rainfall, with reduced volumes, negatively impacting summer crops, especially soybeans.

Climatic conditions make planting difficult, harm crop development and increase the risk of irreversible losses in several regions of the state.

Phytosanitary problems also intensify, with a greater occurrence of pests and the need for preventive applications. 

The information is from Emater/RS.

Bagé and Western Border

In the administrative region of Emater/RS in Bagé, planting has been halted for about two weeks due to the lack of rain. Crops without irrigation systems are at risk of delayed planting, which compromises the productivity of the second-season soybean crop.

In Quaraí, losses of 10% were estimated, with crops in the vegetative phase showing wilting during the hottest hours. In Maçambará, estimated losses reach 5%, reflecting a period of up to 50 days without rain. In São Gabriel, variability is high, with areas of good development and others suffering from a lack of humidity.

During the Campaign, rains are awaited to finish sowing and replanting crops. In Hulha Negra, some producers planted in dry soil, betting on the forecast of rain. In Bagé, the cutworm has reduced stands, with control by night spraying.

Caxias do Sul and Erechim

In the Caxias do Sul region, the weather conditions are favorable for plant development, with no significant incidence of pests or diseases. In Erechim, however, sparse rainfall has caused germination problems, forcing replanting. Crops are showing signs of drought, especially in municipalities such as Erval Grande and Itatiba do Sul.

Frederico Westphalen and Ijuí

Frederico Westphalen has 30% of its areas in bloom, but isolated rains have not been enough to alleviate the water deficit. In Ijuí, the lack of water is already causing losses in areas with shallow and compacted soils. Control of thrips and mites has been intensified.

Passo Fundo and Pelotas

In Passo Fundo, 35% of the crops are in bloom, with no significant losses recorded. In Pelotas, 95% of the expected area has been planted, but winds are reducing soil moisture. Plant development is considered good.

Saint Mary and Saint Rose

In the Santa Maria region, the initial planting estimate was reduced due to lack of water. Crops in the reproductive phase are severely affected, with irreversible damage in areas without rainfall. In Santa Rosa, crops sown early suffer from intense wilting and reproductive losses.

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In Soledade, 35% of the crops are flowering and 3% are in grain filling. Spots caused by water stress are observed, but the overall impacts are still limited. Asian rust is monitored, with preventive applications underway.

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