90 QUINCE CULTURE. 
the quince cultivator, sometimes eats into corn and vari- 
ous fruits. | 
3. QuINCE LEAF BROWNNESS (Morthiera Mespili v. 
Cydonia, C. and E.).—This fungoid disease of the 
leaves is indicated by reddish-brown spots, which show 
on both sides of the leaf, with a small black speck in the 
center of each spot, which speck, on being magnified, 
appears to be four spores in one, each of the four being 
elliptical, and ending in a thread as long as itself. The 
i) 
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SRY iter Soy 
a B R 
on 
rT: . 
SEAS Ae peas Tne 
~ eee ravers = 
\ dank: Semin a 
“ 
fi 
Sing 
Ss Bes 
Sha 
- “ 
neXt Nigaass 
Mee 
Ra a 
RS SSeaT 
= 
Fig. 61.—LEAVES AFFECTED BY MORTHIERA MESPILI. 
rounded spots extend into coalescing brown patches, 
sometimes covering a large part of the leaf. The en- 
largement of the spots is due to the extension of the 
mycelium of the spores, which, as the disease progresses, 
kills the leaves, and they drop to the ground. The older 
leaves generally show the disease first, and from them it 
extends toward the ends of the branches, sometimes nearly 
defoliating the tree. It occurs on trees of every age. 
In studying this disease, Soraner put some spores on a 
te JA 
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