Soybean rust was first reported in 2007 in Oklahoma and again in 2008 about a week before a killing frost in late October. The state's sentinel plot program and rust monitoring activities by soybean growers and crop advisors have increased the awareness of the presence of other foliar diseases in the state.
Soybean cyst nematodes (SCN) are known to occur in 11 eastern Oklahoma counties. A formal survey of the distribution and infestation levels of SCN has not been conducted in Oklahoma. Knowing the current distribution of SCN and infestation levels would help growers better manage the disease through variety selection and crop rotation.
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