“By far, the best solution to nematodes is crop rotation. Or, if the problem is significant, we do have one root knot nematode tolerant variety, TiftGuard, but it has some other limitations,” Monfort adds.

Mueller says the high cost of using Telone II intensifies the need of what he calls ‘ground truthing’.

“The first step in deciding whether to use variable rate application technology is to determine whether you have a nematode problem that is costing more than the $40-50 per acre cost of applying Telone II, regardless of how it’s applied,” he says.

The Veris-generated soil map can be used to help make a variety of management decisions.

These maps can’t tell you whether you have nematodes in the soil, but they can tell you where the highest risks are in a field.

By using these maps a grower can map some logical decisions as to which fields are in a high risk category and save some money by sampling first in these areas for nematodes.

“If these samples come back with high populations of nematodes, the next step will be to determine how much yield damage they are likely to cause and then make a decision as to whether to apply Telone or some other nematicide, like Vydate, which can be used on peanuts, but rarely is used,” the South Carolina plant pathologist says.

“If hot spots of nematodes occur sporadically across a field, a simple on-off system of applying Telone may be a good option. Certainly, it would be considerably less expensive than applying a uniform application of the material,” he adds.

Mueller points out that the nematicide application system used by Doug Jarrell, and a few other South Carolina growers, isn’t technically a variable rate application.

“A true variable rate applicator would be much more expensive, and in truth, we don’t have the data set to support using a highly sophisticated variable rate application system,” he says.

“The growers who have used the on-off system developed by Khalilian and others here at the Edisto Station works fine, and if the nematicides we tested are available, I am confident in some situations with high nematode pressure, it could save growers some money and improve yields,” Mueller adds.

rroberson@farmpress.com

Other articles in the series:

New, improved varieties leading way for U.S. production

X-ray vision points to more efficient peanut grading system

Early-season disease control keeps peanut yield foe at bay

Water-use efficiency becoming priority for peanut producers who irrigate

Taking guesswork out of determining peanut maturity