- B - 



N. C. Improved Control of Apple Diseases Under North Carolina 

 Conditions . To (1) study under N. C. conditions the life 

 histories of apple pathogens and seasonal development of 

 diseases that they cause in order to obtain a sound basis 

 for development of most satisfactory control measures; and 



(2) develop a satisfactory disease control program that will 

 enable growers to decrease production costs, produce increased 

 yields of fruit of highest quality, and market better apples, 



PI. Path., Ent. H-90 Coop. SCS 



Ohio The Control of Fruit Diseases. — 1. The Evaluation of 



Fungicides and the Timing of Fungicide Application for the 

 Control of Apple Scab and Other Fungus Diseases of Apple . 

 To (1) learn effectiveness, safety and economic value of new 

 fungicides used in sprays for the control of apple scab and 

 other fungus diseases of apple; (2) learn best timing of 

 fungicide sprays for control of each fiingus disease of apple; 



(3) learn effectiveness of new fungicides used after infection 

 has been initiated; (4) develop, if possible, effective 

 abbreviated fungicide spray schedule; i.e., one which consists 

 of less frequent spray applications and which therefore would be 

 more econoraicalj (5) learn effectiveness and safety of new 

 fungicides when applied to apples as concentrates and in low 

 gallonages; and (6) learn compatibility of new fungicides with 

 recommended insecticides used on apples, 



Bot. 15-1 



Ohio Multiplication, Preseirvation and Determination of Potential 



Value of Pear Varieties for North Central States Introduced into 

 and Collected Within the United States . To (1) determine 

 adaptability of newly introduced or recently produced pear varieties 

 to the environmental conditions of the North Cent-ral States; and 

 (2) preserve those varieties having potential value either for 

 plant breeding or for other programs in the North Central States 

 where true-to-name source of plant material is necessary. 

 Hort. 73 (NC-7) 



Ohio Apple Scald Control by Means of Oxidizing and Absorbing 



Agents at the Surface of the Skin . To investigate the use of 

 (1) wax emulsions containing oily and greasy substances such as 

 refined mineral oil and petrolatums as absorbers for volatiles 

 causing scald; (2) reactive gases introduced into the atmosphere 

 to combine with or oxidize the volatiles causing scald. 

 Hort. 153 



