Source: Pioneer Hi-Bred
As soybeans reach pod fill and later productive stages this month, it's important for growers to keep an eye out for sudden death syndrome (SDS), according to experts at Pioneer Hi-Bred, a DuPont business.
"We're hearing more reports of SDS showing up, especially in northern Illinois and parts of Iowa," said Jim Trybom, Pioneer agronomy research scientist. "In general, August is the time when the disease starts to show on the leaves."
In the past several years, SDS has become an issue in most soybean-growing areas and often is ranked second only to soybean cyst nematode (SCN) in causing decreased yields and economic losses. The root-rotting organism infects soybean plants very early in the growing cycle; however, above-ground symptoms do not appear until late summer when the fungus produces a toxin that damages the leaves. In recent years, SDS has had a more profound impact in the U.S., moving into high-producing soybean regions. Early planting and cool, moist conditions early in the growing season often result in higher incidence of SDS.