- h - 



Pa. Nutrition. Development and Pathology of Commercial Mushrooms . 



To (1) develop improved nutrient substrate; (2) determine effect 

 of soil casing on physiology; (3) develop superior strains; (U) 

 determine factors controlling size and quality of sporophores; 

 (5) determine influence of volatile substances on growth; and (6) 

 determine nature and cause of certain diseases. 

 Bot. 756 



S. C. A Study of the Relationship of the Fusaria Which Cause Wilt 



Disease . To determine (1) host range of as many wilt-Fusaria as 

 may be available (2) physiological races which seem to be more 

 prevalent than heretofore suspected; and (3) cause of loss of 

 pathogenicity by some fungus isolates. 

 Bot., Bact. 99 Coop. ARS 



W. Va. The Relation of Genetics and Environmental Factors to Growth. 



Physiology and Reproduction of Fungi . To (l) continue work now 

 in progress on effects of environmental factors such as temperature, 

 light, pH and oxygen supply, on growth and reproduction fungi; (2) 

 distinguish between variations due to the environment and those 

 which are inherited; (3) investigate genetic basis and method of 

 inheritance of physiological and morphological characters; and (4) 

 learn effect of environment on expression of genetic factors. 

 PI. Path. 3 



Vt» The Sexual Process and Life Cycle of Sclerotinia Trifoliorum . 



To (l) produce apothecia in abundance under laboratory conditions; 

 and (2) reinvestigate complete life cycle and sexual mechanism of 

 of Sclerotinia trifoliorum . 

 Bot. 37 



Nematode Diseases 



Ala. Nematodes in Relationship to Crop Production in the South . 



To determine (1) identity and geographical distribution of nematode 

 populations as to soil characteristics and associated pathological 

 conditions of plants in southern States and Puerto Rico; (2) factors 

 affecting variability in morphological and physiological characters 

 of plant-attacking nematodes; (3) life histories, feeding habits, 

 and host-parasite relations of certain plant-parasitic nematodes; 

 (4) host range of certain specific nematodes; and (5) effect of 

 natural and man-influenced environmental factors upon abundance, 

 spatial distribution, activity, and relationships of nematodes and 

 associated soil microorganisms. 



Bot., PI. Path. 539 (S-19) Coop. ARS 



