facebook_pixel

Nematodes In The Crosshairs

The problem with nematode control is that there can be high populations with little damage in one section of a field, then low populations with severe damage in another.

“You have to understand that where nematodes are doesn’t mean you are getting damage, so what we are looking for is a response from the nematicide,” says Dr. Charles Overstreet, Extension nematologist and professor in the Department of Plant Pathology at Louisiana State University. His work has been funded through grants from Cotton Incorporated and EPA.

“Cotton Incorporated was a definite factor in the work we are doing,” Overstreet continues. “We are working on measuring nematode responses as you move across soil zones in fields. One of the ways we are looking at doing that is through soil conductivity.”

That requires a piece of equipment developed by Veris Technologies. A Veris machine is a pull-behind cart equipped with pairs of coulters with an electrode on each coulter. One electrode injects a known electrical current into the soil, while the other measures the drop in voltage as the current passes through the soil. Heavier soils conduct more current, while lighter soils conduct less. Once the amount of current that passes through the soil is measured, a detailed map is created showing variations in soil type across a field.

The Veris technology is so popular these days that it has become a verb: “We have to Veris that field.”

“The sandier the soils, the more likely you are to have root-knot nematodes, particularly,” Overstreet says. “That is also where we discovered that you are more likely to get damage. As the soil has more clay content, you might not limit the population of root-knot nematodes, but you certainly don’t see the damage you get in sandy soils.”

Overstreet adds that the same basic scenario can be applied to the reniform nematode, which tends to thrive in silt loams and heavier clay soils.

“What we do is get a picture from the Veris,” Overstreet says. “We break the field into zones – five to seven zones per field. We can then look into each individual zone to determine the yield responses.”

Dr. Ed Barnes with Cotton Incorporated adds, “There was some good progress in ’06 in finding ways to rapidly map root-knot nematode infestations. The approach has been tested and is holding up. We think this will be an additional good use of the technology.”

The Correlation

Maps created by yield monitors are overlaid with Veris maps to give a detailed report on what nematode damage occurred where. “Yield maps would show areas where damage is in the field,” Overstreet says. “Then, we look at the soil types and develop a relationship between soils and damage.”

That correlation leads to something you had to know was coming: Prescription application of nematicides.

“When you use a Veris map and a yield monitor map, you can see where you are getting responses and where you are not,”

And just as importantly, determining which zones do not. “Instead of the way we used to do business – treating the whole field with a nematicide – our goal is now is to only treat the parts of the field where the problems are,” says Overstreet.

Overstreet’s work has been with Telone, K-Pam, Vapam, Temik and Avicta Complete Pak.

Leave a Reply

Disease Control / Nematodes Stories
Disease Control / Nematodes

Be Ready to Fight Diseases in Cotton

June 23, 2017

Add bacterial blight to the list of diseases that Georgia cotton growers should be prepared to fight.

Disease Control / Nematodes

CSI AgriLife: Working to Solve a New Blight Mystery

March 10, 2017

Dr. Terry Wheeler and her Texas A&M AgriLife pathology colleagues are working to solve a mysterious problem thought to have been resolved 40 years ago.

Disease Control / Nematodes

Options for Farmers Battling Cotton Root Rot

January 17, 2017

Cotton root rot disease continues to be a major threat to Texas cotton, but there are options available to help farmers fend off potential threats or lessen the potential economic hardship.

Disease Control / Nematodes

Nematodes Can Survive Winter

December 28, 2016

Just about every crop has its nematode challenges. And many of our winter weeds are excellent overwintering hosts.

Disease Control / Nematodes

Reviewing Bacterial Blight in Georgia Cotton

September 30, 2016

Over the past two growing seasons, bacterial blight has been more visible in Georgia’s cotton than it has been in a number of years.

Disease Control / Nematodes

Spotting (and Managing) Target Spot

August 23, 2016

Target spot may never be a major problem in Mid-South cotton. But, as seen this year, growers need to watch for it under the right field conditions.

Disease Control / Nematodes

New Webcast Focuses on Cotton Virus Detection and Treatment

November 2, 2015

A new webcast focusing on the detection and treatment of cotton viruses has been added to the Focus on Cotton online series from the Plant Management Network and Cotton Incorporated.

Around The Gin
Product News

Americot Adds Three to Regional Sales Force

September 20, 2017

Americot, Inc. has added three new regional representatives to the company’s sales force.

Product News

Enlist One Herbicide Added to Enlist System

September 13, 2017

Dow AgroSciences adds a straight-goods 2,4-D choline herbicide for additional tank-mix flexibility in Enlist crops.

Product News

Elevore Herbicide Registered for Burndown Use

August 30, 2017

Dow AgroSciences’ Elevore herbicide has received federal registration for use in fall and spring burndown programs for cotton, soybeans and corn.

Product News

Stoneville Legacy Club Honors Charter Members

August 24, 2017

The new Stoneville Legacy Club honored 129 growers who recorded average yields of 1,794 lbs/A or higher on at least 20 acres with Stoneville cotton varieties.

Product News

Improved Bollworm Management Expected in 2018

August 23, 2017

Southeast Texas cotton farmers should have new tools available in 2018 to better manage bollworms and other potentially damaging pests.

Product News

Maximizer Club Honors Top FiberMax Dryland Growers

August 17, 2017

The FiberMax Maximizer Club honored 121 growers who yielded at least 1,000 lb/A on dryland acres with FiberMax varieties in 2016.

Product News

Monsanto, Valent Expand Roundup Ready PLUS Partnership

August 7, 2017

Monsanto and Valent U.S.A. are expanding their crop protection partnership for the 2018 Roundup Ready PLUS Crop Management Solutions platform.

Product News

New Broadleaf Burndown Option Coming from Dow AgroSciences

July 31, 2017

A new burndown option for tough broadleaf weeds has shown excellent promise in trials across the Mid-South and Midwest.

Latest News
Disease Control / Nematodes

Be Ready to Fight Diseases in Cotton

June 23, 2017

Add bacterial blight to the list of diseases that Georgia cotton growers should be prepared to fight.

Disease Control / Nematodes

Taking Control of Nematodes

June 8, 2017

Georgia producer Johnny Cochran found a system-wide solution to handle the formidable nematode threat on his operation.

Disease Control / Nematodes

Sweet Tooth Bacteria Tracked in Bacterial Blight

May 25, 2017

Thanks to a new discovery, researchers now may be better equipped to help Texas cotton farmers battle bacterial blight.

Disease Control / Nematodes

CSI AgriLife: Working to Solve a New Blight Mystery

March 10, 2017

Dr. Terry Wheeler and her Texas A&M AgriLife pathology colleagues are working to solve a mysterious problem thought to have been resolved 40 years ago.

Disease Control / Nematodes

Options for Farmers Battling Cotton Root Rot

January 17, 2017

Cotton root rot disease continues to be a major threat to Texas cotton, but there are options available to help farmers fend off potential threats or lessen the potential economic hardship.

Disease Control / Nematodes

Nematodes Can Survive Winter

December 28, 2016

Just about every crop has its nematode challenges. And many of our winter weeds are excellent overwintering hosts.

Disease Control / Nematodes

Reviewing Bacterial Blight in Georgia Cotton

September 30, 2016

Over the past two growing seasons, bacterial blight has been more visible in Georgia’s cotton than it has been in a number of years.

Disease Control / Nematodes

Spotting (and Managing) Target Spot

August 23, 2016

Target spot may never be a major problem in Mid-South cotton. But, as seen this year, growers need to watch for it under the right field conditions.

Disease Control / Nematodes

New Webcast Focuses on Cotton Virus Detection and Treatment

November 2, 2015

A new webcast focusing on the detection and treatment of cotton viruses has been added to the Focus on Cotton online series from the Plant Management Network and Cotton Incorporated.

Disease Control / Nematodes

Researchers Discover Link to Nematode Activity

September 30, 2015

Scientists at the University of Missouri and the University of Bonn in Germany have found a genetic link to a hormone that nematodes use for feeding.

Disease Control / Nematodes

Solving the Nematode Puzzle

August 27, 2015

Growers and consultants in Georgia are finding ways to help boost yields and profits in nematode-infested fields.

Disease Control / Nematodes

New Cotton Webcasts Focus on Seedling Diseases and Soil Fertility

April 29, 2015

Two new webcasts focusing on seedling diseases and soil fertility have been added to the Focus on Cotton online webcast resource.

Disease Control / Nematodes

Not All Boll Rot Caused by Bacterial Blight

October 31, 2014

Identifying the cause of boll rot in Mississippi this season is not a simple task.

Disease Control / Nematodes

Nematode Research on the Rise

October 30, 2014

Take a peek at the seed company pipelines, and you’ll notice a common theme – nematode control.

Crop Inputs

New Cotton Webcasts Focus on Irrigation and Foliar Disease Management

July 18, 2014

Two new webcasts focusing on crop protection and irrigation management have been added to the Focus on Cotton online webcast resource, developed by Cotton Incorporated and the Plant Management Network.