Powdery Mildew, Foliage Diseases Increase In MO Wheat

Fields in the southern portion of Barton County were scouted by Wyatt Miller, an agronomy assistant with University of Missouri Extension, and Tim Schnakenberg, agronomy specialist with MU Extension.

Wheat fields scouted this week were in Feekes stages of both seven and eight. It is likely that the majority of the wheat will be in Stage eight soon. Wheat planted late may not reach stage eight for a while.

Stage eight begins when the flag leaf begins to emerge from the plant. During this stage, at least three nodes will be visible above the soil surface. Stage eight is significant because the flag leaf is responsible for about 75% of the effective leaf area contributing to grain fill.

“To be sure the flag leaf is emerging, split the leaf sheath above the highest node. If the head and no additional leaves are found then the wheat is in stage eight,” said Schnakenberg.

Bird cherry oat aphids were found in some of the wheat fields scouted this week. Economic threshold levels for bird cherry oat aphids is 12-15 per linear foot, but as wheat gets into later growth stages, threshold levels significantly increase.

Bird cherry oat aphid numbers also tend to decrease in hot weather.

“Producers should be on the lookout for Septoria leaf blotch, powdery mildew, and other foliage diseases. Foliage diseases tend to do well in warm, wet or humid weather,” said Schnakenberg.

Septoria leaf blotch begins as light yellow flecks or streaks that expand into yellow to reddish brown irregularly shaped blotches. Often, dark brown specks may be scattered within the centers of mature lesions. Some septoria leaf blotch has been seen in some fields in the area.

Conditions have also been ideal for powdery mildew development. Powdery mildew infections begin as light green to yellow flecks on the leaf surface. As powdery mildew develops, leaf surfaces become covered with patches of cottony white mold growth.

“These patches eventually turn a grayish white to grayish brown. Some powdery mildew has been seen, but did not warrant concern at this time,” said Schnakenberg.

For more information on this scouting report or to learn how you can receive it by telephone each week, contact the MU Extension Center in Barton County at 417-682-3579.

These weekly field crop scouting reports are sponsored by MU Extension in Barton County and the Barton County Soil and Water Conservation District.

Leave a Reply

Fungicides Stories

Frog eye leaf spot on soybean
FungicidesNew FMC Website Provides Season-Long Updates On Fungicide Plots
July 7, 2016
Grow Forward with FMC Fungicides is a plot initiative in key corn and soybean producing regions showcasing fungicides from FMC. Read More
Wheat Field North Dakota
Crop InputsTrivapro Fungicide Yield Results Elevate 2016 Crop Outlook
May 10, 2016
As growers evaluate business models and consider their 2016 management plans, strong first-year trial results for Trivapro fungicide from Syngenta Read More
Young Corn Closeup
FungicidesSummer Fungicides: Still A Difficult Sell
May 6, 2016
About a dozen years ago, Asian soybean rust (ASR) was working its way up to the U.S. from South America, where Read More
Spenser Forgey, Yahama Fortix
FungicidesIndiana Farmer Wins Arysta LifeScience FORTIX Fungicide Sweepstakes
April 28, 2016
Arysta LifeScience North America recently presented Spenser Forgey, a grower from Young America, IN, with a new 2016 Yamaha Grizzly Read More
Trending Articles
Key Cooperative Marcus Construction Steel Building
Retail FacilitiesMarcus Construction Builds High-Speed Agronomy Center For Key Cooperative
July 7, 2016
Key Cooperative in Grinnell, IA, wanted a state-of-the-art Agronomy Center to better serve its customers. Marcus Construction delivered exactly that. Read More
Heritage Cooperative
Retail FacilitiesKahler Automation Designs State-Of-The-Art Facility For Heritage Cooperative
July 4, 2016
Heritage Cooperative in Marysville, OH, needed an efficient liquid, dry and grain facility to serve the many needs of their Read More
The Andersons Waterloo
ManagementFirst Indiana Facility Certified Under 4R Nutrient Stewardship Certification Program
June 27, 2016
The 4R Nutrient Stewardship Certification Program has announced that The Andersons, Inc.’s Waterloo, IN, facility has been added to its Read More
Food IT
Industry NewsCalifornia Event Will Mix Ag And Tech Professionals To Explore IT Solutions
June 20, 2016
Silicon Valley is hot on agriculture, and an upcoming event in California will bring together the food and tech industries Read More
Monsanto Luling Plant
Eric SfiligojWhat’s Next For Monsanto?
May 31, 2016
For the folks at Monsanto’s headquarters in St. Louis, MO, it has been an eventful few weeks. Back on May Read More
Soybean Plant closeup
Industry NewsMonsanto Rejects Bayer Bid; Open To More Talks
May 25, 2016
Monsanto Co, the world’s largest seed company, turned down Bayer AG’s $62 billion acquisition bid as “incomplete and financially inadequate” Read More
Latest News
ASMARK 2016 Retailers Live! Tour - CPS
CropLife 100CPS Acquires Texas Retail Operation
August 23, 2016
Crop Production Services (CPS) has acquired the assets of Larry’s Chemical and Spray, Inc., for an undisclosed amount in an Read More
PrecisionAg Video Conference
Precision AgVideo: PrecisionAg Vision Conference
August 22, 2016
A Strategic Conference Focused on the Future of Farm Digitization and Precision Agriculture Visit precisionagvision.com and register today! Read More
Young Corn Plants
Industry NewsOABA Welcomes Nicole Wallace As Communication & Adm…
August 22, 2016
The Ohio AgriBusiness Association has hired Nicole Wallace as its communication and administrative coordinator. Wallace will help provide comprehensive communication Read More
Syngenta Sign
Crop InputsChemChina, Syngenta Receive Clearance From CFIUS
August 22, 2016
China National Chemical Corp. (ChemChina) and Syngenta have announced that the companies have received clearance on their proposed transaction from the Read More
ManagementAg Industry Shows and Rumors
August 18, 2016
Editors Paul Schrimpf and Eric Sfiligoj talk about the upcoming trade show schedule, crop protection merger updates, and content for Read More
MAGIE 2015
EquipmentMAGIE Takes The Pulse Of The Ag Retail Industry
August 18, 2016
Every year, one of the major highlights of my career as an ag journalist is attending the Midwest AG Industries Read More
MAGIE 2015 Overview
EquipmentPride In Professionalism On Display At MAGIE
August 18, 2016
The Illinois Fertilizer & Chemical Association (IFCA) is proud to partner with CropLife IRON and continue the tradition of bringing Read More
SprayersJenner Ag To Debut 25th Anniversary Edition Case IH Pat…
August 18, 2016
Visitors at the 2016 Midwest Ag Industries Exhibition (MAGIE) in Bloomington, IL, will have a unique photo opportunity, as Jenner Read More
Crop InputsEU Glyphosate Controversy Heating Up Yet Again
August 17, 2016
The battle over glyphosate rages on in Europe, creating a lot of question marks over whether the herbicide will continue Read More
Industry NewsNew Partnership Provides Improved Representation At Ohi…
August 16, 2016
The Ohio AgriBusiness Association (OABA) has retained Belinda Jones of Capitol Consulting Group, Inc. (CCG) for government relations work in Read More
Tissue testing
FertilizerMosaic: 6 Tips For Better Crop Nutrition In Corn
August 16, 2016
Late in the crop season is a good time to assess visual nutrient deficiencies and ensure early- and mid-season deficiencies Read More
WebinarsWebinar Schedule
August 14, 2016
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
Dow DuPont
Crop InputsDowDuPont Update: EU Takes Closer Look at Merger
August 12, 2016
Dow Chemical Co. and DuPont Co. face months of haggling with European Union antitrust regulators who opened an in-depth probe Read More
ManagementNews from InfoAg 2016 and Weed Wands
August 11, 2016
Editors Paul Schrimpf and Eric Sfiligoj review what happened at last week’s big Precision Ag event and a possible solution Read More
Crop InputsFBN: We’re ‘Here To Stay’
August 11, 2016
PERSPECTIVE — If you’ve been following this site for a while you might remember a certain editorial we published on Read More
Diversified Agri-Services
StewardshipDiversified Agri-Services Certified In 4R Nutrient Stew…
August 11, 2016
The 4R Nutrient Stewardship Certification Program has announced that Diversified Agri-Services Inc. in McCutchenville, OH, has been added to its growing Read More
Soil
FertilizerSoil Health Experts Gain Ground On Standardized Measure…
August 11, 2016
Soil health experts from across North America plan to integrate more research projects to provide agricultural producers and policy makers Read More
Regulator 3.0 Concentrate
AdjuvantsNew Max Systems Product Aids Irrigation
August 11, 2016
A gentle rainfall is nearly always welcomed by crop producers, including those who rely on irrigation to produce a profitable Read More