444 Report or THE HorTICULTURIST OF THE 
wood. The infection is spread chiefly by insects, especially by 
bees. 
Pear blight attacks several other pomaceous plants — the apple, 
crab apple, quince, ete. 
Treatment.—Although the cause of the disease is now well 
known no thoroughly successful method of treating it has been 
found. The only thing that can be done is to cut out and burn 
the diseased parts as soon as the blight appears. This should be 
done promptly; for the disease spreads rapidly. Waite recom- 
mends” that all trees subject to the disease be thoroughly in- 
spected several times during the growing season. He says that the 
two most important periods for such inspection are: (1) About 
two weeks after blooming; (2) just before the leaves drop. 
The cutting should be done several inches below the lowest 
point of discoloration, in order to make sure that all of the disease 
is removed. Care should be taken never to cut into healthy 
wood with a knife or saw that has come in contact with diseased 
wood, until after the tool has been disinfected by wiping it off 
with a cloth saturated with kerosene, a five per ct. solution of 
earbolic acid, or some other germicide. 
LEAF BLIGHT. 
(Hntomosporium maculatum Lev.) 
Description.—This is caused by a parasitic fungus which makes 
its appearance early in the spring. It is first found on the new 
leaves where it appears as bright, reddish spots on the upper sur- 
face. These spots rapidly increase in size and later the leaves 
turn brown and finally fall. It attacks the young twigs in the 
same manner and frequently kills back many of them. When the 
fruit is attacked the bright colored spots are first formed. These 
spots soon become dark colored, and spread out in every direc- 
tion; the surface of the pear becomes rough where attacked by 

39 Fifty-Seventh Ann. Rept. N. Y. State Agr. Soc., 1897: 787. 
