Corn test shows no evidence of nematode injury

decrease font size  Resize text   increase font size       Printer-friendly version of this article Printer-friendly version of this article

Amid growing questions of nematodes' effect on corn yields in Ohio, a recent sampling in the 2011 Ohio Corn Performance Test locations found no visible evidence of nematode injury, an Ohio State University Extension specialist says.

Several seed companies submitted hybrid entries in the performance test that included nematicide seed treatments, said Peter Thomison, an OSU Extension agronomist. Soil samples were collected to assess whether nematodes may be present at test sites. Two bulk samples of 20 cores each were taken from each test site, all of which have a history of some form of conservation tillage, he said.

"Nine of the sites followed soybeans, one followed corn," Thomison said. "There was no visible evidence of nematode injury, such as uneven growth or stunted plants, in sampled plots."

The purpose of the test is to evaluate corn hybrids for grain yield and other important agronomic characteristics. Results of the test can assist farmers in selecting hybrids best suited to their farming operations and production environments.

The nematode analysis was done at Michigan State University's Diagnostic Services laboratory and was funded by Pioneer Hi-Bred, a DuPont company, he said.

"The lab results provided populations and a risk index for root-lesion, dagger, lance, stunt, pin and spiral nematodes," Thomison said. "Nematode populations were generally low to non-existent, with spiral nematodes being the most common nematode present in any quantities.

"With the exception of one sample from the Beloit location in Mahoning County, the risk index for the different nematode populations was 'none detected' to 'low.'"

At Beloit, one sample contained 56 dagger nematodes, indicating the potential for a moderate risk of damage, he said. The other Beloit sample indicated that nematodes were low to non-existent.

The testing was done as nematodes are receiving more attention as a potential yield-limiting factor in corn.

While it is unclear if Ohio corn growers will have a problem with nematodes, farmers, growers and researchers are taking a closer look at the issue to see if the tiny organisms negatively impact corn yields and if seed treatment nematicides are needed, according to Terry Niblack, an Ohio State University plant pathologist.

Nematodes are microscopic worm-like soil organisms that, depending on the species, can either benefit or harm the growth and development of corn. Their effects on corn roots are garnering more attention as the harmful species are being discovered in more cornfields throughout the Midwest, according to Niblack, a nematologist and chair of Ohio State's Department of Plant Pathology.

Plant-parasitic nematodes can be a problem for corn yields because they feed on corn roots and reduce root growth. Their root feeding reduces the plants' ability to uptake nutrients and water, and can also encourage bacterial and fungal pathogens to enter the plant.

Buyers Guide

Doyle Equipment Manufacturing Co.
Doyle Equipment Manufacturing prides themselves as being “The King of the Rotary’s” with their Direct Drive Rotary Blend Systems. With numerous setup possibilities and sizes, ranging from a  more...
A.J. Sackett Sons & Company
Sackett Blend Towers feature the H.I.M, High Intensity Mixer, the next generation of blending and coating technology which supports Precision Fertilizer Blending®. Its unique design allows  more...
R&R Manufacturing Inc.
The R&R Minuteman Blend System is the original proven performer. Fast, precise blending with a compact foot print. Significantly lower horsepower requirement. Low inload height with large  more...
Junge Control Inc.
Junge Control Inc. creates state-of-the-art product blending and measuring solutions that allow you to totally maximize operating efficiency with amazing accuracy and repeatability, superior  more...
Yargus Manufacturing
The flagship blending system for the Layco product line is the fully automated Layco DW System™. The advanced technology of the Layco DW (Declining Weight) system results in a blending  more...
Yargus Manufacturing
The LAYCOTE™ Automated Coating System provides a new level of coating accuracy for a stand-alone coating system or for coating (impregnating) in an automated blending system. The unique  more...
John Deere
The DN345 Drawn Dry Spreader can carry more than 12 tons of fertilizer and 17.5 tons of lime. Designed to operate at field speeds up to 20 MPH with full loads and the G4 spreader uniformly  more...
Force Unlimited
The Pro-Force is a multi-purpose spreader with a wider apron and steeper sides. Our Pro-Force has the most aggressive 30” spinner on the market, and is capable of spreading higher rates of  more...
BBI Spreaders
MagnaSpread 2 & MagnaSpread 3 — With BBI’s patented multi-bin technology, these spreaders operate multiple hoppers guided by independent, variable-rate technology. These models are built on  more...

Comments (0) Leave a comment 

e-Mail (required)


characters left

Demco 1400 Grain Cart

Demco offers a 1400 bushel grain cart to provide unmatched efficiency and operator convenience. In addition to the large 1400 ... Read More

View all Products in this segment

View All Buyers Guides

Feedback Form
Feedback Form