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PLANT DISEASE CONTROL 



Ark. The Use of Fungicides in Controlling Diseases of Horticul- 



tural Crops . To determine materials, timing and methods of 

 application best adapted to control of horticultural crop 

 diseases under Arkansas conditions; and evaluate effect of use 

 of fungicides on development of disease complexes of various 

 crops. 



PI. Path. A07 



Conn. Dynamics of Fungicidal Action . To discover chemical and 

 physical bases for fungicidal action, and to use these dis- 

 coveries for building newer and better fungicides. 

 PI. Path., Bot. 63A 



Conn. The Chemotherapy of Plant Diseases . To discover compounds 

 useful in plant chemotherapy, to exploit these compounds in 

 Connecticut agriculture, and determine how the compounds bring 

 about disease control. 

 PI. Path., Bot. 6/»5 



Del. Control of Phytopathogenic Fungi, Bacteria, and Nematodes 

 in Soil3 . To control the phytopathogenic organisms which are 

 prevalent in Delaware soils. 

 PI. Path. 17-P 



Fla. Effects of Biocidal Materials on the Physiology of Plants . 

 To correlate metabolic shifts with morphological changes in 

 plants produced as the result of the application of additives 

 such as herbicides, fungicides and insecticides. 

 Bot. 728 



111. Orchard JSpray Improvement , (l) Study and evaluate 



inorganic and organic chemicals used for plant disease control 

 under laboratory, greenhouse, and field conditions; (2) relate 

 performance of materials to many factors associated with fruit 

 disease control and yield of quality fruit. 

 PI. Path. 68-377 



Iowa Seed Treatments for the Control of Seed-Borne and Soil- 

 Inhabiting Pathogens . To learn (1) limitation of organic 

 chemicals for certain disease fungi; (2) value of different 

 chemicals in relation to application methods, dosage, duration 

 of storage, etc.; (3) relative effect of soil temperature, 

 moisture, and types on effectiveness of seed treatments; (4) 

 need for seed treatments on different varieties and lines of 

 agronomic crops; and (5) effect of seed treatment chemicals 

 on enzyme systems affecting growth and sporulation of fungi 

 Bot., PI. Path. 858 



