What is in this article?:
- When aldicarb was withdrawn from the U.S. market, cotton farmers began worrying about how they would deal with root-knot nematodes and other troublesome underground pests. Monsanto intorduces new variety resistance to root-knot nematodes.
- DP 1454NR is being targeted to two areas primarily – the area south of Lubbock around Seminole and Seagraves, Texas, and for the lower Southeast U.S. It is a full maturity variety.
Good yield potential with or without nematode pressure
“So what our breeders have done through the marker technology is select this line in very good germplasm to fulfill both sides of that coin – overall good genetics and yield performance without nematodes and an overall high level of resistance.”
Tested as 13R347B2R2, the new variety yielded with competitor varieties in the absence of high nematode populations and provided yield advantages in fields with moderate to high root-knot nematode levels, according to growers.
“It was the highest yielder at 2,239 pounds per acre,” said Jeremy Louder of Stanton, Texas. “The loan on it was 56.03 cents and the turnout was extremely good at 39 percent. I've been watching this variety for three years in a research plot that we have, and I hope it's our solution to the problem of life without Temik, because every farm we have is just eaten up with root knot nematodes.”
In Brooklet, Ga., Greg Sikes evaluated DP 1454NR B2RF compared to a competitor’s RKN-susceptible variety in a field with nematode problems. Although planted under a pivot, irrigation was not necessary due to extreme amounts of rainfall during the growing season.
“There was a significant visual difference looking across the field at the two varieties,” said Sikes. “We pulled up some of the plants and looked at the roots, and there's obvious difference there, as well.”
Albers says growers need to recognize that the new variety does not provide immunity to root-knot nematodes. “There will be a small amount of galling on these plants, but what we’ve seen is that root development proceeds normally as the plant with it resistance is able to interrupt the reproduction of the root-knot nematodes.
“So the numbers don’t build up to the levels you would have with a susceptible variety, and root development continues in a very normal way. We’re learning a lot about these new varieties, and what we’re seeing late in the season is better plant health in those situations where you would normally have a lot of injury due to root-knot nematodes.”
DP 1454NR is being targeted to two areas primarily – the area south of Lubbock around Seminole and Seagraves, Texas, and for the lower Southeast U.S. It is a full maturity variety and will fit well in areas that normally plant full season types.
“Growers who are very interested in the new variety will get some bags to try on their fields in 2014,” says Albers. “By 2015, we expect to have a much larger supply.”
During a briefing on the new launch at the NPE Summit, Deltapine representatives were asked about using a seed treatment with DP 1454NR?
“This is a breeding trait. It’s not a biotech trait,” Albers notes. “But as a breeding trait, it does bring full-season-long control. The benefit where a seed treatment will help the grower is early in the year. I think there is really that upside of adding a seed treatment on top of this level of resistance we have to get the crop off to the best start possible.
“The flip side is that in cotton we’ve not had a high level of resistance like we have in this new trait in this new variety so we don’t know yet if planting this same variety on the same field year after year could cause a race shift and give us a new race that could get around this. Certainly, we want to be good stewards of this new trait, and we want it to last as long as possible,” Albers said.