According to the latest report from the Guía Estratégica para el Agro (GEA) of the Bolsa de Comercio de Rosario (BCR), July weather conditions in the agricultural core region left 47% of the late corn harvest unfinished, affecting nearly 150,000 hectares due to high humidity and a lack of field access. Technicians in Alvear warned that the delay poses serious risks, noting that sprouted sorghum lots are already visible and that approaching the fields to check the corn generates genuine fear among workers.
Late Corn Harvest Stalled Across Core Region Fields
Persistent rains and a lack of ground stability effectively halted the late corn harvest throughout July, leaving nearly 150,000 hectares uncollected. While the BCR’s survey does not point to a generalized state of deterioration across the pending acreage, it underscores the inherent risks of prolonged exposure after an extended period of high humidity. Producers and technicians now await the moment when machinery can finally re-enter the fields to assess the condition of the grain.
Weather conditions during July brought solar radiation levels between 20% and 40% lower than those recorded during the same period in 2025, according to the BCR. Looking ahead, the entity anticipates a shift toward colder, sunnier, and more stable weather, with frosts and minimum temperatures ranging between -2 and -4 °C expected for Monday the 10th.
Did You Know? July rainfall in the core region averaged 22 millimeters, coming very close to the historical mean of 20 millimeters, yet the distribution varied dramatically as eastern locations like Ramallo accumulated 79 millimeters while western areas received very few.
Wheat Crops Show Strong Growth Despite Lower Radiation
Wheat producers share the expectation for colder weather as crops navigate an unusual vegetative cycle driven by winter conditions. Analysis from the GEA/BCR station network showed that the core region received between 20% and 40% less average daily radiation between June 1 and July 31 than in the corresponding period of 2025. Last year, favorable radiation and low temperatures supported exceptional yields averaging 60 quintales per hectare across the region.
Despite this year’s lower radiation and a 7% increase in average temperatures compared to 2025, the BCR found wheat crops growing in very good condition. Technicians in Bigand reported dense macolling, achieving densities of about 500 to 600 tillers per square meter without luminosity problems. However, an accelerated cycle has caught the attention of observers, with crops near Corral de Bustos approaching the stem elongation phase earlier than the usual August window.
If moderate temperatures and higher radiation emerge during the critical period, the crop could still compensate for earlier climatic disadvantages.
Sanitary Conditions and Sanitary Outlook
The combination of above-average temperatures and high humidity has also created favorable environments for crop diseases, though officials report no widespread crisis so far. Technicians in Pergamino warned that diseases will progress, noting that bacterial blight spots are already visible in fields. The GEA notes that the overall environmental radiation and thermal balance between June 1 and July 26 proved 21% less favorable than in the same span of 2025.
Uneven rainfall distribution further complicates the regional outlook. While the western core region received sparse precipitation, eastern sectors saw totals triple the monthly average, with Baradero registering 65 millimeters and Rosario logging 58 millimeters. The BCR emphasized that if favorable weather arrives during the critical window, the crop retains its capacity to offset earlier setbacks.
Frequently Asked Questions
What percentage of the late corn harvest remains pending in the core region?
According to the Bolsa de Comercio de Rosario, 47% of the late corn harvest, totaling nearly 150,000 hectares, remains uncollected.
How do current wheat conditions compare to last year?
Between June 1 and July 31, the core region received 20% to 40% less daily radiation than in 2025, and average temperatures were 7% higher, yet current wheat crops are growing in very good condition with strong tillering.
What weather conditions are expected next in the region?
The BCR anticipates the return of cold, sunny, and stable weather, with frosts and minimum temperatures between -2 and -4 °C forecasted for Monday the 10th.
How will the expected return of colder temperatures and frosts influence the development stages of the advancing wheat crops across the core region?
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