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Investigations on the Field Diseases of Sweet Potatoes . 

 To (l) investigate the role of nematodes in sweet potato 

 production and use of nematocides for their control; (2)survey 

 horticultural and agronomic crops for strains of Fusarium 

 o xysporium that are infectious to sweet potato; (3) establish 

 value of vine cuttings in controlling black rot and scurf of 

 sweet potatoes, and role of soil organic matter on longevity 

 of the respective pathogens. .Endoconidiophora fimbriata and 

 Monilochaetes infuscans ; (O investigate mode of transmission, 

 host range, diagnosis and physiology of internal cork disease 

 and other viruses; and (5) study life cycle and economic 

 importance of Fusarium surface rot, 



Pl.Path. 91 



Improvement of Sweet Potatoes by Breeding , (l) Develop 

 better varieties of sweet potatoes with: greater production of 

 marketable roots; more attractive shape and color of roots and 

 improved culinary quality; greater nutritional value with specical 

 reference to carotene and ascorbic acid contents; disease 

 resistance with special reference to stem rot, soil rot and 

 nematodes; improved keeping quality of roots and ability for sprout 

 production; growth of vining habits which adapt crop to mechanized 

 cultural and harvesting operations; (2) gain knowledge of trans- 

 mission of above characteristics from parent plant to its progeny; 

 inheritance of wilt, nematode, and soil rot resistance; inheritance 

 of vitamins A & C; (3) study factors affecting flowering and cross 

 and self -incompatibilities relating to fruit-set and seed develop- 

 ment. 



Hort. 596 



The Breeding and Improvement of Sweet Potatoes . To study 

 (l) strains which are productive and free from disease and which 

 produce roots of desirable shape and quality ; (2) possibilities of 

 creating homozgyous strains constant for yield, root shape, and 

 other factors; (3) development of new varieties and strains which 

 combine earliness, disease resistance, productivity, and high quality, 



Hort. 121 



Tomatoes and Peppers 



Breeding and Selecting Tomatoes . To produce varieties or 

 strains of tomatoes suitable in quality, yielding ability, and 

 disease resistance to the needs of tomato growers in Arkansas. 



Hort., For. 206 



Etiology and Control of Seed-Borne, and Soil-Borne Diseases 

 of Tomatoes , To (1) determine importance and distribution of various 

 diseases; (2) study effect of cultural practices, soil types, and 

 varieties as related to the incidence and control of diseases of 

 tomatoes; and (3) determine variability in virulence and adaptability 

 of pathogens existing under Arkansas conditions. 



PI. Path. 298 



