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“The best way to manage nematodes is to be as proactive as possible,” says Tom Allen, associate professor with an Extension and research appointment at the Delta Research and Extension Center at Stoneville. “And the first step in doing that is to sample, sample, sample, sample — I can’t emphasize this enough."
SOIL SAMPLING is a critical first step in managing nematodes in cotton. "If you have a nematode problem in your cotton fields, you could easily be losing the cost of the soil sample in yield," says Tom Allen.
Telone a good tool
“Based on trials we’ve conducted, you can get an excellent response from Telone — as much as a 200-pound increase in seed cotton when high root-knot populations are present.
“Telone works, I’m a big believer in the product. In all the trials we’ve had, it looks great, if used in a site specific management program in areas where nematodes are a problem.
“If you look at the yield across a large area, such as by collecting entire treated strips in a boll buggy, you’re not going to see a difference. You’ve got to look at small areas within a field to see how it’s performing. Fumigants won’t provide season-long prevention, but they will provide enough prevention that you’ll decrease nematode numbers and improve yield.”
It’s hard to get a handle on how much product is available from year to year, Allen says.
“There is no distribution point in Mississippi for Telone, and there are only two to three applicators in the state that I know of, so we don’t currently have the ability to cover a lot of acres.”
Foliar applications of Vydate “will reduce root-knot nematodes a little bit. But you’re trying to manage a root pest with a foliar application, and I haven’t seen data that suggest this practice gets outstanding results.
“If you wanted to use Vydate with a seed-applied nematicide and a fairly tolerant variety, that might be a good integrated approach. The problem is, very little data are available to suggest how effective this type of integrated practice would be.”