Bt Corn Root Injury Confirmed In Western Illinois

The Western corn rootworm season is progressing at an unprecedented pace, reports professor of entomology and crop sciences Extension coordinator Mike Gray of Illinois. Reports of severe injury to Bt corn that expresses the Cry3Bb1 protein targeted against corn rootworms have come in from western Cass County. In 2011, similar reports of injury to Bt hybrids expressing this protein surfaced in other North Central states, particularly in Iowa.

“Thus far, resistance to this protein in Illinois has not been confirmed,” said Gray. However large numbers of Western corn rootworm adults are visible in the whorls of plants in Cass County. Seed industry representatives confirmed that beetles were observed early last week, nearly a full month earlier than when they are usually first reported, around the Fourth of July.

The plants were under intense moisture stress, the leaves were rolled tightly, and beetles were feeding on the epidermis of corn leaves.

“This type of injury often occurs when beetle emergence is early and plants have not yet begun to shed pollen or produce silks,” Gray said. The plants in the fields that were visited were not at this reproductive stage of development.

Roots were removed randomly from this field and from a nearby field that also had been planted to a Bt hybrid expressing the Cry3Bb1 protein. Roots from both fields exhibited feeding injury with more injury in the second field, although fewer beetles were observed there. Because adults were not as noticeable in the second field and emergence was just beginning in the first field, root feeding is expected to continue in both fields.

No lodging was observed, probably because the plants were short and the soil was hard and dry. “However, as root feeding continues and plants become taller, lodging should be expected, especially if storms with rain and winds materialize,” said Gray.

At this point, it is not clear why performance challenges of some Bt hybrids expressing this protein are continuing. However, producers should remain vigilant during this growing season and report any performance issues with corn rootworm injury on their Bt hybrids.

Leave a Reply

Seed/Biotech Stories

Thunder Seed Grower and dealer
Seed/BiotechSeed Decisions: Balancing Price And Performance
November 1, 2016
Even a cursory glance at headlines covering the seed industry these days could move a reader to an “OMG!” moment. Read More
Soybean field
Crop InputsIncotec Invests In North America
October 25, 2016
Leading seed enhancement company Incotec, part of Croda, has announced an investment in their North America business. The total investment of Read More
Nufarm Seed Treatment lab formulations
Seed/BiotechNew Lab, Company Realignment Strengthen Nufarm’s Position To Serve Seed Treatment Market
October 6, 2016
As part of its “One Nufarm” strategy, Nufarm is realigning and uniting resources to further enhance the focus on its Read More
Soybean Field
Seed/BiotechBayer, West Central Distribution Introduce Fungicde Seed Treatment For Soybeans
October 6, 2016
Bayer and West Central Distribution are introducing a new combination fungicide treatment for soybean plants, Redigo 480 + Trilex, to Read More
Trending Articles
R4023 Sprayer, John Deere
CropLife 100Ag Retail Equipment Report: The Green Party Continues
December 7, 2016
In the annual race for sales in the ag retail equipment marketplace, the color schemes for participants are a little Read More
Mike Stern
Precision AgClimate Corp. CEO Talks Retailer Support For Digital Ag
December 1, 2016
CropLife Magazine’s sister publication, AgriBusiness Global, recently sat down with Mike Stern, CEO of The Climate Corp., following the Monsanto subsidiary’s Read More
Precision AgTrimble Debuts End-to-End FMIS Platform
November 28, 2016
October’s inaugural PrecisionAg Vision Conference left this author with many thoughts and things to ponder in the coming months. Probably Read More
CHS Primeland
CropLife 100The 2016 CropLife 100 Report: Reviewing The Many Bulls And Bears Impacting This Year’s Marketplace
November 28, 2016
For virtually all of 2016, the nation was wholly focused on the big Presidential election. Some folks aligned themselves with Read More
Monsanto sign
Crop InputsMissouri Governor Meets With Bayer CEO To Discuss Monsanto Merger
November 21, 2016
Missouri Gov. Jay Nixon visited Bayer AG global headquarters in Leverkusen, Germany, on November 18 to discuss the proposed Bayer-Monsanto Read More
STS16 2017
SprayersHagie Manufacturing Releases 2017 STS16 Sprayer To Market
November 16, 2016
Hagie Manufacturing LLC’s largest full season applicator is now available with enhancements for the 2017 model year. Hagie is officially Read More
Latest News
ManagementARA 2016 Report and Crop Mix for 2017
December 9, 2016
Editors Paul Schrimpf and Eric Sfiligoj talk about the recent Agricultural Retailers Association meeting and the projected acreage mix for Read More
AgriSync
Matt Hopkins17 Agriculture Apps That Will Help You Farm Smarter In …
December 9, 2016
Ag professionals are working smarter, not harder, than ever before. Smart farming technologies have enabled them to reduce costs, maximize Read More
Ryan Bartlett
Crop InputsCompass Minerals Appoints Vice President, Innovation An…
December 8, 2016
Ryan Bartlett, Ph.D., has joined Compass Minerals as vice president, innovation and product development. Dr. Bartlett will be responsible for Read More
HerbicidesHerbicides 2017: New Cropping Systems Set For Debut
December 7, 2016
Herbicide-resistant weed are inching ever-closer to a potentially frightening saturation point here in the U.S. Heading into 2016, USDA planting Read More
CropLife 100Wilbur-Ellis Acquires Michigan Ag Retailer
December 7, 2016
Wilbur-Ellis’ Agribusiness, a recognized leader in precision agriculture technology and the distribution and marketing of plant protection, seed and nutritional Read More
Fertilizer storage The Andersons
CropLife 1002016 Fertilizer Report: Another Really Rough Year For A…
December 7, 2016
In many ways, the fertilizer category cannot seem to catch a break. During the early part of the 2010s decade, Read More
R4023 Sprayer, John Deere
CropLife 100Ag Retail Equipment Report: The Green Party Continues
December 7, 2016
In the annual race for sales in the ag retail equipment marketplace, the color schemes for participants are a little Read More
Winter wheat
HerbicidesTalinor Herbicide Approved For Wheat And Barley
December 7, 2016
Talinor herbicide from Syngenta has received federal registration from the U.S. EPA, giving wheat and barley growers a new option Read More
Forage Sorghum
UncategorizedMilestone Achievement Continues For Dow AgroSciences, A…
December 7, 2016
New and innovative forage products are on the horizon driven by continued collaboration between Dow AgroSciences, a wholly owned subsidiary Read More
Palmer pigweed seedhead in cotton
HerbicidesNew WSSA Factsheet Explores Weed Seeds And Their Longev…
December 7, 2016
Did you know some weed seeds can lie dormant in the soil for more than a century and then sprout Read More
Crop InputsARA 2016: 5 Developments Worth Monitoring Into 2017
December 6, 2016
You can pretty much set your watch to it (do people even still wear watches? I know I do…but I’m Read More
Tim McCardle, ARA Chairman
CropLife 100BRANDT COO Named ARA Chairman
December 5, 2016
BRANDT EVP and Chief Operating Officer Tim McArdle has been named chairman of the Agricultural Retailers Association (ARA) during a Read More
Crop InputsWilbur-Ellis Receives ResponsibleAg Certification At Mo…
December 5, 2016
Wilbur-Ellis Co., a recognized leader in precision agriculture technology and the distribution of crop protection products, announces the ResponsibleAg certification Read More
Young Corn Closeup
Eric SfiligojThe Read On 2017 For Agricultural Fortunes Is Anybody’s…
December 5, 2016
As I (and others) have written in recent months, the nation has just experienced one of the most offbeat election Read More
Acceleron B-300 seed coating
Crop InputsThe BioAg Alliance Launches New Yield-Boosting Microbia…
December 5, 2016
As part of their commitment to develop and commercialize innovative microbial solutions for farmers through The BioAg Alliance, Monsanto Co. Read More
ManagementCorn and soy planting update; Takeaways from Climate Co…
December 2, 2016
AgriBusiness Global Editor Dave Frabotta Joins Paul Schrimpf for a discussion of global corn and soybean planting trends, and a Read More
Radish cover crop taproot
Crop InputsSoil Health Institute, Datu Research Receive Grant To E…
December 1, 2016
The Soil Health Institute (SHI) and Datu Research have announced a $626,000 grant from the Walton Family Foundation to quantify the Read More
Mike Stern
Precision AgClimate Corp. CEO Talks Retailer Support For Digital Ag
December 1, 2016
CropLife Magazine’s sister publication, AgriBusiness Global, recently sat down with Mike Stern, CEO of The Climate Corp., following the Monsanto subsidiary’s Read More