-37- 



Tex. The Influence of Physiological Factors on the Expression 



of Parasitic Diseases of Cotton . To (1) study relation between 

 organic & inorganic content of cotton seeds & their suscepti- 

 bility to seedling diseases, (2) learn relationship between 

 the supply of major & minor nutrient elements & resistance of 

 cotton to bacterial blight, & (3) learn effect of increased 

 concentrations of certain minor elements in cotton seeds on 

 seedling disease resistance. 



PI. Physiol. & Path., Agron. 1007 Coop. ARS 



Tex. Chemical and Biotic Control of the Pink Bollworm . (l) 



Develop effective controls & coordinate these with control of 

 other cotton insect pests. (2) Evaluate & learn nature of 

 biotic action in cotton types exhibiting resistance or toler- 

 ance. 



Ent., Agr. Engin., Agron. 1094 (S-37) Coop. ARS (Also 



see Part 7, Section a. ) 



Tex. Biological and Chemical Factors Influencing the Cotton 



Root Rot Fungus, Phymatotrichum Omnivorum . By biochemical, 

 microbiological, & physical procedures establish interrelations 

 between cotton root rot fungus & its environment, emphasizing: 

 (l) influence of chemical & physical factors operating in soil 

 on mycelial development & formation of sclerotia; (2) factors 

 involved in longevity & breaking of dormancy of sclerotia: (3) 

 evaluation of role of concomitant soil microorganisms; (4) 

 effect of fungitoxic chemicals on growth & activity of Phy- 

 matotrichum omnivorum ; (5) isolate & study compounds secreted 

 by root rot fungus; (6) development of improved criteria for 

 evaluating actual infestation status of disease potential of 

 field situations. 



Substa. 5, PI. Path. 1102 Coop. ARS 



E. Economics and Marketing 



Ala. Marketing of Cottonseed for Planting Purposes in Alabama . 



To (1) study & describe organization & operation of existing 

 marketing structure including agencies, facilities, & legal 

 regulations about cotton seed for planting; (2) determine prac- 

 tices of cotton producers in obtaining seed for planting; (3) 

 learn adequacy of supply of planting seed in relation to de- 

 mand; (4) evaluate practices of distributing agencies in market- 

 ing planting seed; & (5) learn possibilities of improving market- 

 ing system for planting seed to reducing costs & improving ade- 

 quacy & availability of seed of desired quality. 

 Agr. Engin. 541 Coop. USDA 



