- 26 - 



Calif. Orange-Tree Quick Decline; Root stock Scion Relations 



Affecting Its Occurrence and Prevention * Methods to be used 

 include determination of the susceptibility to quick decline 

 of commercial citrus scions on various rootstocks, topworking 

 to non-susceptible tops, inarching with resistant rootstocks, 

 and rootstock identification in investigation of: (l) degree 

 of susceptibility of various stock-scion combination including 

 sweet orange, lemons, grapefruit, and miscellaneous scion 

 varieties on sour orange stock; (2) the effects of top working 

 susceptible sweet orange trees to other species of citrus 

 including degree of response after topworking trees which are 

 (3) the effects of substituting resistant rootstocks for 

 susceptible sour orange roots on sweet orange trees by inarching; 

 and (k) identification of rootstocks, 

 Hort. 1382 



Hawaii Improvement of Commercial Strains of Papaya (Carica 



Papaya L «). (l) Develop improved commercial strains of papaya 

 for fresh fruit market and for processing by means of cross 

 breeding, inbreeding, and selection; (2) learn genetics of 

 tree and fruit characters as disease resistance, fruit size, 

 shape, quality, firmness, color, and seed cavity size. 

 Hort. 173 



Nuts 

 Tex. Foliage Diseases of Pecans and Their Control. To 



develop (1) an effective spray or dust program for the 

 control of prevalent foliage diseases of the pecan; and (2) 

 test fungidicdes that will be compatable with commonly used 

 insecticides and which will not result in increased insect 

 populations. 



Fl. Physiol. & Path., Ent. 736 



