The sooty blotch-flyspeck (SBFS) disease complex is the major target of fungicide sprays from shortly after petal fall until harvest. The fungi in this complex blemish the fruit cuticle. The result can be loss of up to 94% of the crop’s market value,since blemished fruit are downgraded from fresh-market to cider grade and water loss is accelerated during storage of SBFS-infested apples.
Iowa State University
Tatalovic, Nenad; Gleason, Mark L.; and Batzer, Jean C., "Evaluation of Weather Data asInputsto a Disease-Warning System for Control of Sooty Blotch and Flyspeck" (2008). Iowa State Research Farm Progress Reports. 688.