- 18 - 



N, C, An Investigation of the Types. Numbers. Ecology and Factors 

 Affecting Phagocytosis in Simple Slime Molds Occurring in 

 Cultivated and Uncultivated Soils of North Carolina , To learn 

 importance of simple slime molds as part of soil microflora and 

 their effect upon numbers and activities of microbes associated 

 with them, 

 Bot. 37 



Ohio Effect of Crop Rotations in the Incidence of Diseases Caused 

 by Soil-Borne Pathogens and Associated Changes in Soil Fungus 

 Populations , To determine (1) effect of rotation on the incid enc e 

 of diseases caused by soil-borne pathogens from relative amounts 

 of damping-off and root rots of assey plants; (2) effect of rotations 

 on numbers and types of soil fungi, and to correlate those changes 

 with disease incidence; (3) host range of soil pathogens on field 

 crops important in Ohio, and study antibiotic and antagonistic 

 relationships, soil types, fertilizers, and organic matter which 

 may affect their pathogenicity. 

 PI. Path., Bot. 63-1 



Ohio Forage Crop Root Rot Investigations , To (l) learn contribution 

 of damping-off and seedling blight of alfalfa and red clover to 

 seeding failures, the relationship of these diseases to root rots, 

 and relative importance of various root rots to stand losses in Ohio; 

 (2) investigate effects of management and environmental factors on 

 the susceptibility of alfalfa and red clover to root rot damage; (3) 

 study factors affecting the occurrence and distribution of the soybean 

 root rot in Northwest Ohio; (A) learn the effects of crops, crop 

 sequences, and crop residues on incidence of forage crop root rots, 

 on prevalence of forage crop root and crown rot fungi, and on changes 

 in soil fungal population; (5) investigate mechanisms of soil borne 

 pathogen and soil fungal population changes, 

 Bot. 75-1 



Or eg. Relation of Crop Residues to the Development of Certain Root 



Rot Diseases of Nursery Crops , To learn (l) effect of certain ^rop 

 residues on development of root diseases of ornamental plants, 

 caused by Phytophthora cinnamoni and P. lateralis ; (2) influence of 

 soil temperature and moisture on effects of crop residues in sup- 

 pressing or stimulating disease development; (3) if suppression of 

 disease associated with certain crop residues is biological, chemical 

 or physical, 



PI. Path. 196 (W-38) 



S, C. A Study of Microbial Antagonisms in South Carolina Soils with 

 Special Reference to Antagonistic Action of Soil Bacteria. Actino- 

 mycetes. and Fungi on Certain Soil- In habiting Phyto pathogens . U7 

 Learn antagonistic action of some microorganisms isolated from 

 South Carolina soils upon selected phytopathogens ; (2) develop means 

 of utilizing antagonistic reactions as means of biological control 

 of some soil-borne plant diseases, 

 Bot. & Bact. 133 (S-26) 



