Dry, hot conditions generate SCN concerns
Experts warn dry, hot conditions will lead to more soybean cyst nematode problems this year and beyond.
Greg Tylka with the SCN Coalition says he hates to be the bearer of bad news, but soybean cyst nematode seems to have increased reproduction in hot, dry soils.
“And certainly through a good part of the state of Iowa and other places, we’ve endured drought conditions in 2020. So that’s got us worried.”
He tells Brownfield the impact to yield could be really bad due to an SCN “double whammy.”
“The first whammy if you will is the fact that numbers are higher. But the second whammy is that soybean cyst nematode in high numbers stunt soybean roots. Well, the worst time you want to have stunted soybean roots in a field is during a drought year.”
Tylka says the higher SCN numbers won’t be a significant problem next year unless a farmer grows beans on beans. But in 2022, Tylka suggests the “chickens will come home to roost” in traditional corn/soybean rotations IF farmers aren’t proactive. He recommends collecting soil samples this fall, using resistant soybean varieties and seed treatments, and to consider rotating other non-host crops.