Research conducted at SDSU on fungicide seed treatments in corn, spring wheat, winter wheat and soybeans over the last six years indicates inconsistent yield increase as a result of fungicide seed treatments.

"For example 52% of soybean fungicide seed treatment trials had a yield difference between fungicide treated and non-treated seed of less than 3 bu./acre," Byamukama says.

Similarly, he says other research results from various studies in the Midwest indicated that the probability of breaking even depended on the environment and genetics of the cultivar used.

"If the environment favored high disease pressure – wet and cool soil temperature – and the cultivar planted was susceptible, then seed treatment was beneficial" Byamukama says. "That's why it is important for growers to scout their fields and have an idea about the history of plant diseases in their fields."