Evening Report | ISU Plant Pathologist Dishes Dirt

Southern rust has infected corn in at least 18 states as of Monday...

Pro Farmer's Evening Report
Pro Farmer’s Evening Report
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RFA weighs in on implications of record forecast… USDA’s record corn crop forecast is fueling the ethanol industry’s argument for removing regulatory barriers. Renewable Fuels Association President Geoff Cooper told the National Ethanol Conference quote ““Demand is not keeping up with the corn supply, period. we saw these huge numbers printed this week by USDA, and we think that should serve as a wake-up call to both Congress and the administration.” Cooper cited what he deems senseless, outdated EPA regulations as having tied E15 up in red tape.

Declines at Deere & Co… Deere and Company this morning reported a 26% decline in net income compared to the same quarter last year, reflecting weakening demand in the agricultural equipment market. Total net sales and revenues decreased by 9%. In response,Deere narrowed its full-year net income guidance.

ISU Plant Pathologist dishes dirt on southern rust… Alison Robertson says she has been at Iowa State University (ISU) for 21 years, and she’s never seen as widespread a problem southern rust is in Iowa this season. She believes the disease is present in every one of the state’s 99 counties. She reports the disease moved into Iowa early, right at the beginning of grain fill.

“I’ve never seen this before...we’re just going to have to see how bad it gets,” Robertson, an ISU Extension field crops pathologist, told AgriTalk Host Chip Flory. Corn yield losses from the disease can reach 30% and even more, depending on infection severity.

Southern rust has infected corn in at least 18 states as of Monday, according to the Crop Protection Network (CPN). Along with Iowa, the CPN has confirmed the disease in other Midwest states, including Illinois, Kansas, Minnesota, Missouri, Nebraska and a “probable” finding in Michigan.

Southern corn rust, caused by the fungus Puccinia polysora, creates round, light brown to orange spots scattered mainly on the upper leaf surface. They might also appear on husks, stalks, lower leaf surface and ear shanks. -Thanks to Rhonda Brooks, AgWeb.com

Retailers agree to Fertilizer Code of Practice… ANKENY, Iowa - Agriculture’s Clean Water Alliance (ACWA) marked a major milestone at its 25th Anniversary Celebration with the official adoption of the 2025 Fertilizer Code of Practice, a voluntary agreement between 12 ag retailers statewide to prohibit sales and application of nitrogen in early fall when conditions make nutrients more volatile.

With 413 member locations in 87 of Iowa’s 99 counties, the code’s voluntary adherence has wide ranging impact.

“In the past 10-15 years we have seen wide area adoption of nitrogen stabilizers across Iowa that have been shown to maintain our fall and spring nitrogen in a soil-stable form longer vs a leachable form of nitrogen like nitrate. In doing so, we are managing the nitrogen needs of our corn crop, protecting the environment and ground water and providing a useful application tool for our customers leading to a win-win-win situation” said Eric Scherder - Corteva US CP Technical Lead & ACWA Communication & Outreach Chair. -source: Agriculture’s Clean Water Alliance news release

Crop Insurance deadline looms… USDA reminds agricultural producers that the final date to apply for or make changes to their existing crop insurance coverage is quickly approaching for fall-planted crops. Sales closing dates vary by crop and location, but the next major sales closing dates are September 1 and September 30. Producers are encouraged to visit their crop insurance agent soon to learn specific details for the 2026 crop year.

Notable closes:
New-crop corn sales of 2.05 million metric tons were in line with trade expectations with Mexico accounting for nearly half-a-million tons of the sales. Unknown Destinations, Japan, Taiwan and Guatemala were also on the list of buyers. Solid demand is limiting selling, but that is offset by the lack of a threat to corn yields across most of the corn belt in the weather forecast.

  • September corn futures were a penny higher at $3.75
  • December corn was steady at $3.97 1/4

Tuesday’s cut to estimated bean acres should limit downside price risk, but after a solid three-day rally, the market was primed for profit taking. November bean futures posted an outside trading day and narrowly avoided a downside reversal.

  • September beans were 16-and-a-half cents lower at 10-oh-7-and-a-half
  • November beans down 15 and three-quarters to 10-28-and-a-half