Southern Rust Confirmed In 20 Nebraska Counties, Severity Increasing

Southern rust of corn has been confirmed in 20 Nebraska counties and has likely spread to others, but samples haven’t been submitted for confirmation, reports Tamra Jackson-Ziems, University of Nebraska-Lincoln Extension Plant Pathologist.

During the weeks since southern rust was first confirmed, severity had not increased much, likely due to the unseasonably cool weather. However, during the last week, farmers, crop consultants, and UNL Extension faculty in eastern and southern Nebraska are reporting a rapid increase of southern rust in some fields. Warmer temperatures forecast for the coming days in combination with high humidity and precipitation could support further disease increase.

Scouting And Management

Unfortunately, the protection provided by fungicides applied more than three weeks ago has likely worn off. Corn in many areas of the state still has several vulnerable weeks of grain fill left. According to the publication, Corn Growth and Development (Abendroth, et al., 2011, Iowa State University Extension), more than 50% of kernel dry matter weight can accumulate during the R5 (dent) stage, making protection of leaf area during this stage critical to maintaining high yield potential.

Scouting is essential in areas where corn is still in the early stages of grain fill and the disease has not been reported or where it has been confirmed and needs to be monitored for severity. Continue to scout and monitor for early evidence that the spores are infecting corn plants, such as the sudden development of new, small yellow flecks on leaves. These flecks can indicate early disease development, such as rusts, and may help anticipate an increase in disease and potential need for fungicide application.

Severe southern rust and other foliar diseases covering substantial leaf area can lead to stalk rot diseases as stalks are cannibalized during grain fill. Stalk rot diseases can reduce standability, leading to lodging and complicating harvest.

Leave a Reply

Fungicides Stories

FungicidesSudden Death Syndrome, Brown Stem Rot Reported In Indiana Soybeans
September 3, 2014
Farmers and retailers should be watching for symptoms of these two diseases over the next few weeks as they are best managed through preventative methods. Read More
FungicidesResearchers Target Soybean Disease With Genetic Resistance Study
August 6, 2014
University of Illinois researchers will share new information on controlling sudden death syndrome through genetic resistance at this year's Agronomy Day. Read More
Soybean field
FungicidesValent Launches New Seed Protection Fungicide For Soybeans
July 16, 2014
The INTEGO SUITE System contains the first new, novel seed protection fungicide chemistry registered in 30 years by the EPA for protection against Pythium and Phytophthora. Read More
FungicidesNew Players May Make Pest Headlines In Corn, Soybean
April 1, 2014
The usual insects and diseases took a bit of a break in 2013, but other culprits surfaced — and could return. Read More

Trending Articles

Matt Hopkins15 Best New Agriculture Apps Worth Downloading In 2014
December 16, 2013
These latest agriculture apps are sure to help ag professionals do their jobs more efficiently in 2014 and beyond. Read More
Seed/BiotechMonsanto Offers New Support For Ferguson, Area Communities
October 8, 2014
Monsanto Co. has committed $1 million in new support for several collaborative efforts in Ferguson, MO, and surrounding communities in North St. Louis County. Read More
Seed/BiotechUnapproved Genetically Modified Wheat Found In Montana
October 3, 2014
USDA reports that one year after discovery of Monsanto's unapproved wheat in a single Oregon field disrupted U.S. wheat export sales, the GMO wheat has again been found in Montana. Read More
Equipment2014 Product Of The Year Voting
September 19, 2014
Many new products were introduced to the ag retail marketplace this year. From this group, CropLife IRON and its consulting partners have selected five finalists for the Product of the Year award. Please cast your vote today to help us determine the winner. Read More
FertilizerFall Fertility 2014: Forecasting Fertilizer Use
September 7, 2014
Great crops this year have tapped the soil, and fall work is definitely called for, but how challenging will that get? Read More
CropLife 100CHS To Build $3 Billion Fertilizer Plant In North Dakota
September 5, 2014
The fertilizer plant in Spiritwood will be the single largest investment in CHS history, as well as the single largest private investment project ever undertaken in North Dakota. Read More

Latest News

Seed/BiotechEPA Approves Dow’s Enlist Duo Herbicide
October 15, 2014
The Enlist Weed Control System, breakthrough technology to fight resistant and tough weeds, has received the long-awaited green light from federal regulatory authorities. Read More
MicronutrientsGypsum On Farms Could Help Keep Water Clean, Not Green
October 14, 2014
Gypsum, which has roots in the past as a farm soil treatment, also may have a bright future, and not just as a booster of crops but also as a protector of water. Read More
Photo credit: The United Soybean Board/The Soybean Checkoff.
Crop InputsVerdesian Grows Sales Staff
October 14, 2014
The new account managers will drive sales growth and support relationships with key customers in the plant nutrition and seed treatment and inoculants product categories. Read More
WebinarsUpcoming Webinars
October 14, 2014
Register for one of our upcoming Webinars or access our archive of past Webinars to view recordings of presentations that may be of interest to you. Read More
CropLife 100The Andersons Purchases Six Grain Elevators, Four Agron…
October 14, 2014
The Andersons has acquired Auburn Bean and Grain of Auburn, MI, which will increase the storage capacity of its Grain Group by about 13%. Read More
StewardshipThree Ohio Ag Retailers Honored With 4R Certification
October 13, 2014
The 4R Nutrient Stewardship Certification Program has announced its first three agriculture nutrient service providers to achieve certified status. Read More
Eric SfiligojEntering Agriculture’s New Phase
October 13, 2014
The market’s giddy ride the past few years might be coming to an end in 2015, warns one industry insider. Read More
Eric SfiligojWar And Green Peace
October 11, 2014
A one-time member of Green Peace recently explained why he left the organization after 15 years. Read More
StewardshipCover Crops Add To Farm Sustainability
October 10, 2014
Farmers nationwide find cover crops to be a tool that helps groundwater, prevents erosion, builds soil quality and complements existing best management practices. Read More
EquipmentMeeting Changing Liquid Storage Needs
October 10, 2014
Tank and containment choices are expanding with shifts in farming practices and the economy. Read More
StewardshipEDF Launches Initiative To Reduce Fertilizer Pollution …
October 9, 2014
The effort will engage farmers and businesses throughout the supply chain to transform the way fertilizer-dependent grain crops are grown and sourced. Read More
ManagementMACA 2014: The State Of The Agricultural Industry, And …
October 9, 2014
The trade association’s annual gathering featured speakers from across agriculture and beyond. Read More
FertilizerASA: Drainage Tiles A Big Part Of Phosphorus Problem
October 8, 2014
A pair of studies published in the Journal of Environmental Quality today indicate that the buried network of drainage pipes known as the tile system can carry away as much phosphorus as surface runoff. Read More
FertilizerCompass Minerals Debuts Phosphorus Blend For 2015
October 8, 2014
The makers of Wolf Trax DDP Nutrients designed Nu-Trax P+ with the CropStart Nutrient Package, a blend of phosphorus (25%), zinc (20%), manganese (5%) and nitrogen (4%). Read More
ManagementIndiana Certified Crop Advisor Of The Year Nominations …
October 8, 2014
Indiana Farm Bureau and the Indiana Certified Crop Adviser Program are seeking nominations for the Indiana Certified Crop Adviser of the Year Award. Read More
Seed/BiotechMonsanto Offers New Support For Ferguson, Area Communit…
October 8, 2014
Monsanto Co. has committed $1 million in new support for several collaborative efforts in Ferguson, MO, and surrounding communities in North St. Louis County. Read More
Precision AgGoogle Glass: New Tool For Ag
October 8, 2014
New wearable smart technologies such as Google Glass show potential to greatly impact how we accomplish the business of feeding the world. Read More
FertilizerJ. R. Simplot To Build New Ammonia Plant In Rock Spring…
October 7, 2014
The new plant will supply both the Rock Springs, WY, and Pocatello, ID, phosphate fertilizer production locations while having the capacity to meet the company’s next phase of anticipated phosphate expansion plans at Rock Springs. Read More