South America Calling
Alastair Stewart South America Correspondent

Tuesday 01/28/14

Brazil Sees Asian Soybean Rust Decline; Costs Rise

Timely spraying has allowed Brazilian soybean farmers to effectively control the threat of the Asian rust fungus this season, although it has come at a cost.

Up until Monday, Brazil had registered 226 cases of the disease, down 15% from the same time last year, according to the Anti-Rust Consortium, a monitoring group led by Embrapa, a government research agency.

However, spending on controlling the disease is 14% higher at $2.21 billion, according to Embrapa numbers, which is partially offset by a 6% increase in planted area.

While much attention has been paid to the new threat posed by the spread of the corn earworm this season, Asian rust remains perhaps the biggest threat to the soybean crop. The fungus causes lesions on the leaves of soybean plants, which impede the formation of the bean and can result in massive yield losses. In more extreme cases, the fungus can kill the plant.

However, since it arrived in the first half of the last decade, Brazilian farmers have learned to manage the fungus' threat, spraying on the first reports of cases in their region rather than waiting for the telltale yellow mosaic to appear on their own plants.

While control of the fungus has been generally good across Brazil this season, there has been one black spot, in the southeast of Goias. The No. 4 soybean producing state accounts for 37% of all cases in Brazil this season.

The rust surge in Goias may have been due to the late application of fungicides, says Claudia Godoy, an Embrapa researcher.

Normally, rust propagates in January, but heavy rains fell in the state during November, which could have nurtured the fungus' spread earlier than expected.

February and March are traditionally the most dangerous months for rust as the spores multiply and attack plants in the later phases of development.

However, early planting this season will limit the impact in March. According to Agroconsult, a local consultancy, some 42% of the Brazilian crop will be ready to pick by the end of February.

Brazil's crop is in excellent shape with some local analysts forecasting output could be near 92 million metric tons.

Alastair Stewart can be reached at


Posted at 9:25AM CST 01/28/14 by Alastair Stewart
Post a Blog Comment:
Your Comment:
DTN reserves the right to delete comments posted to any of our blogs and forums, for reasons including profanity, libel, irrelevant personal attacks and advertisements.
Blog Home Pages
October  2015
            1 2 3
4 5 6 7 8 9 10
11 12 13 14 15 16 17
18 19 20 21 22 23 24
25 26 27 28 29 30 31
Subscribe to South America Calling RSS
Recent Blog Posts
  • Brazilian Soy Planting on Schedule
  • Brazil Farm Customs Inspectors Call Off Strike
  • Brazilian Soy Planting Edged Forward Last Week
  • Brazilian Soy Forward Sales Strong in September
  • Reading Brazilian Grain Export Numbers
  • Mato Grosso Stamps Down on Second-Crop Soy
  • Brazilian Customs Strike Enters 12th Day
  • Brazil Soy Planting Gets Underway
  • Brazilian 2015 Wheat Imports Seen Down, For Now
  • Brazilian Farm Custom Inspectors Strike
  • Brazilian Ethanol Exports Surge, Window Closes
  • Brazilian Fertilizers Sales Continue To Perk In August
  • Brazil's Asian Rust Alert
  • Brazil Debt Rated Junk; Grain Industry Benefits For Now
  • Estimates Reaffirm Larger Brazilian Soybean Area
  • Brazilian Soy Market Slows
  • Argentine Wheat Gets Rest From Rains
  • Brazilian Crop Chemicals Market to Remain Firm
  • Brazil GMO Planting On The Rise
  • Upturn in Brazilian Fertilizer Demand