- 37 - 



N, Y. The Fire Blight Disease of Pome Fnilts and Its Control , 

 (Cornell) 2. Thi~Susceptibillty of Rootstocks and Tree Framevork to the 

 Disease d To (1) develop resistant rootstock eind framework 

 for~"pear trees so that when infections occur they will not 

 extend into all "branches of trees and prevent infections in 

 roots; and, (2) determine relative s\asceptibility of different 

 rootstocks being developed for apples, suid search for resist- 

 ant selections, studying method of propagation to learn if 

 this does influence development of infection. 

 Pomol., Plant Path. 129-2 



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

 Conditions . To (1) study under North Carolina conditions 

 the life histories of apple pathogens emd seasonal develoiment 

 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 gjrowers to decrease production costs, produce increased 

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



Plant 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 apples; (2) learn best timing of 

 fungicide sprays for control of each fungus disease of apples; 



(3) learn effectiveness of new fungicides used after infection 

 has been initiated; (k) develop, if possible, effective abbre- 

 viated fungicide spray schedule; i.e., one which consists of 

 less frequent spray applications and which therefore would be 

 more economical; (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 The Control of Fruit Diseases, 3. The Control of Bac - 



terial Diseases of Fruit Plants^ To develop (1) practiceil 

 and effective control of fire blight disease of apples and 

 pears; and, (2) effective control of bacterial spot of peach 

 and other stone fruits. 

 Bot, 15-3 



