QUINCE DISEASES 393 



i Control. 



The vulnerable point of attack lies in the inability of the 

 fungus to reinfect the quince. It must pass to the cedar. 

 The most direct method of control is to exterminate cedars near 

 the orchard. The juneberry and hawthorn are to be regarded 

 as weeds in the sense that they harbor the undesirable pest, 

 and should therefore be removed. Spraying quinces for the 

 control of rust is not a reliable method of treatment. 



REFERENCES 



Stone, G. E., and Smith, R. E. The quince rust. Massachusetts 



Agr. Exp. Sta. Rept. 10 : 61-63. 1898. 

 Stewart, F. C. Notes on New York plant diseases, I. Quince. Rust, 



Gymnosporangium clavipes C. and P. New York (Geneva) Agr. 



Exp. Sta. Bui. 328 : 385. 1910. 

 Bailey, L. H. The quince in western New York. Rust. Cornell 



Univ. Agr. Exp. Sta. Bui. 80 : 625-627. 1894. 

 Halsted, B. D. Some fungous diseases of the quince fruit. The 



quince rust. New Jersey Agr. Exp. Sta. Bui. 91 : 3-5. 1892. 

 Halsted, B. D. The quince rust. New Jersey Agr. Exp. Sta. Rept. 



1892 : 307-310. 1893. 

 Paddock, W. Plant diseases of 1901. Quince rust. Colorado Agr. 



Exp. Sta. Bui. 69 : 18-20. 1902. 

 Sturgis, W. C. Miscellaneous notes on fungi. Quince rust (Rcestelia 



aurantiaca Pk.). Connecticut Agr. Exp. Sta. Rept. 18 : 137-138. 



1895. 



FRUIT-SPOT 



Caused by Phoma pomi Passer. = Cylindrosporium pomi Brooks 



This disease was first noted on the quince in New Jersey in 

 1892. It was subsequently observed in New Hampshire in 

 1910 and in Connecticut in 1911. It is now common in New 

 England and in the Middle Atlantic region. The Orange 

 quince seems particularly susceptible. The disease also affects 

 the apple and Chinese quince. 



Fruit-spot, or blotch, appears late in August or early in 



