444 KErouT of thk IIokticultukist ov the 



wood. The infection is spread chiefly by insects, especially by 

 bees. '^ ' 



Pear blight attacks several other poniaceoiis plants — the apple, 

 crab apple, quince, etc. 



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 ba thoroughly in- 

 spected several times during the growing season. Tie 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 fi.ve per ct. solution of 

 carbolic acid, or some other germicide. 



LEAF BLIGHT. 



{EntomO'S'porium 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. Kept. N. Y. State Agr. Soc., 1897: 787. 



