Theses and Dissertations

Issuing Body

Mississippi State University


Irby, J. Trenton

Committee Member

Catchot, Angus L.

Committee Member

Dodds, Darrin M.

Committee Member

Sarver, Jason M.

Committee Member

Allen, Thomas W

Date of Degree


Original embargo terms


Document Type

Graduate Thesis - Open Access


Plant and Soil Sciences (Agronomy)

Degree Name

Master of Science


College of Agriculture and Life Sciences


Department of Plant and Soil Sciences


The need for profitable soybean production practices gain continually with increasing input costs and reduced profit margins. Constant cultivar and product developments has resulted in limited current data available regarding the profitability of preventative fungicide applications and physiological benefits that can occur from these applications. Research was conducted during 2017 and 2018 to determine optimal fungicide application timing, while assessing multiple fungicide options and resulting effect on soybean grain yield, seed quality, and profitability. Additional research was conducted to determine optimal row spacing, planting date and fungicide application combinations to maximize soybean production profitability. These data suggest using multi-mode of action fungicide treatments increased soybean grain yield, regardless of application timing. These data also suggest, profitability from application of multi-mode of action fungicides can be observed at lower adjusted market prices.