396 MANUAL OF FRUIT DISEASES 
rot is fully as objectionable. Usage demands that the name 
bitter-rot be employed. Quinces grown in close proximity to 
apples affected with bitter-rot may be expected to succumb. 
However, if history is a reliable basis for prediction, the disease 
may never be: expected to assume destructive proportions. 
(See Apple, page 14.) 
REFERENCE 
Halsted, B. D. Some fungous diseases of the quince fruit. The ripe 
rot of quinces. New Jersey Agr. Exp. Sta. Bul. 91:11-12. 1892. 
Brown-Rot 
Caused by Sclerotinia cinerea (Bon.) Schrot. 
The decay of quince fruit caused by Sclerotinia cinerea is 
distributed generally over the globe. A closely related species 
of fungus (S. fructigena) very frequently attacks apples and 
pears as well as quinces in Europe. Considerably less damage 
is done to the quince than to apples and pears. It is also 
’ less destructive in America than in Europe on any of the three 
above-named fruits. Sometimes S. fructigena attacks stone- 
fruits in Europe; however, the brown-rot of ‘stone-fruits and 
pome-fruits in America is due chiefly or entirely to S. cinerea. 
The characters of brown-rot on quinces are not notably different 
from those described for peaches, to which the reader is referred 
(page 270). Special control measures do not seem necessary, 
at least in America. 
Crown-GaLL 
Caused by Bacterium tumefaciens E. F. Smith and Townsend 
Galls in the form of small swellings occur on various portions 
of the limbs and twigs of quince trees. Often an entire limb is 
covered by the irregular, warty outgrowths. Crown-gall is 
