AbstractsBiology & Animal Science

The purpose of these studies 1s two-fold; first, to determine by cultural and soil tests whether or not the occurrence of scab 1s affected byantagonism between Actinomyces spp., causing scab, and other soil micro-organisms; second, to determine the effectiveness of applying chemicals tothe soil as a control measure for scab and the relationship, if any, between the activity of the chemicals as measured by scab control and theoxidation-reduction potentials of the soils used. The dual nature of the studies to follow necessitates dividing this thesis into two parts.