Submitted to: American Phytopathological Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: July 3, 2005
Publication Date: July 3, 2005
Citation: Dunlap, C.A., Schisler, D.A., Behle, R.W. 2005. Drying and osmotic shock tolerance of Cryptococcus nodaensis OH 182.9; a biocontrol agent of Fusarium head blight [abstract]. American Phytopathological Society Abstracts. Phytopathology 95-S26. Technical Abstract: Cryptococcus nodaensis OH 182.9 has reduced Fusarium head blight in numerous greenhouse and field tests. Developing C. nodaensis into a commercially viable biocontrol agent requires knowledge of its environmental limitations. Biocontrol agents are typically formulated as wettable powders or granules for greater storage stability and ease of use. The method and amount of drying can significantly affect the viability of the microorganism. During the drying process, the microorganism experiences thermal and osmotic pressure gradients. Understanding the extent to which a microorganism can survive these stresses is important in developing a successful drying method. The current study examines the effect of different drying methods on the viability of C. nodaensis. In addition, the ability of C. nodaensis to survive an osmotic shock was examined. Sorption isotherms were used to characterize the binding affinity of water with C. nodaensis. The results will be interpreted in a context of drying process optimization.