302 Disease-Producing Microorganisms 



tions of the soil are modified by supplying more nutrients to the 

 antagonists or by creating a favorable reaction, the antagonists will 

 not develop. The introduction of organic materials, such as green 

 manures and stable manures, may correct such a condition, thus 

 favoring development of the antagonists, which bring about, directly 

 or indirectly, suppression of the disease-producing agent. 



Selected Bibliography 



1. Daines, R. H., Control of plant diseases by use of inorganic soil amend- 

 ments, Soil Sci., 61:55-66, 1946. 



2. Johnson, F., Heat inactivation of wheat mosaic virus in soils. Science, 95: 

 610, 1942. 



3. Garrett, S. D., Root Disease Fungi, Chronica Botanica, Waltham, Mass., 

 1944. 



4. Newhall, A. C, Volatile soil fumigants for plant disease control, Soil Sci., 

 61:67-82, 1946. 



5. Sanford, S. B., Some soil microbiological aspects of plant pathology, Sci. 

 Agr., 13:638, 1933; Soil Sci., 61:9, 1946. 



6. Waksman, S. A., The Actinomycetes, Chronica Botanica, Waltham, Mass., 

 1950. 



7. Weindling, R., Microbial antagonism and disease control, Soil Sci., 61:23- 

 30, 1946. 



