New York AGRICULTURAL EXPERIMENT STATION. 457 
fruit is attacked, numerous small black specks appear on its sur- 
face. As the spots increase in size they often grow into each other 
and form a large, dark, diseased area. The disease does not extend 
so deep into the tissue of the fruit as to make it entirely worthless, 
but the market value is greatly lessened. When the fruit is at- 
tacked before it has reached its full size, it often occurs that the 
quinces, like the diseased pears, are mishapen and undersized. 
Greater damage is done to the trees when the leaves are severely at- 
tacked. The loss of foliage in midsummer not only leaves the 
fruit undeveloped but it is a severe check to the growth and vigor 
of the tree. 
Treatment.— Favorable results in treating this disease with the 
Bordeaux mixture are reported. It is suggested that the treat- 
ment recommended for apple scab be used against quince fruit 
spot and leaf blight, making the first spraying when the blossom 
buds have appeared, the second just as the blossoms are falling, 
and a third about two weeks later. 
RUST. 
(Gymnosporangium spp.) 
Description.— The rust is due to a fungus which becomes estab- 
lished and develops within the tissues of the quince branches or 
fruit. It causes knotty branches and peculiarly distorted fruit on 
which there appear tiny fringed pits filed with orange colored 
dust giving the diseased parts quite a brilliant appearance. 
In a different form this rust fungus attacks the red cedar and 
the common juniper, forming galls on their branches. In these 
galls are developed spores which, distributed by the winds to 
quinces, juneberries, hawthorns and apples, become established 
on these trees and cause the rust. Usually the rust is not abun- 
dant enough on quinces to cause serious injury. It is usually 
recommended that the cedar and juniper trees in the vicinity be 
destroyed to prevent the breeding of the fungus on them and that 
the rusted fruit or branches also be removed and destroyed. The 
