1048 



THE FRUIT INDUSTRY IN NEW YORK Si ATE 



By devoting all his time to the work such a man will be able to 

 handle about forty to fifty acres of ten-year-old trees; older 

 trees will require more time than do younger ones. A group 

 of growers having a small area may combine to employ such a 

 man during the growing season. An area considerably larger 

 could be handled by a man of ability if <vumcient assistance were 

 placed at his command. 



PEAR SCAB 



This disease greatly resembles the 

 scab of apple, and the causal organ- 

 isms of each are closely related. The 

 disease is widely distributed and prob- 

 ably occurs wherever pears are grown 

 commercially. In the United States, 

 it is reported most commonly from the 

 northern section, but its attacks have 

 been severe even in California. It 

 occurs most abundantly during moist 

 cool weather, and sections where such 

 weather prevails are most likely to be 

 troubled. 



The Flemish Beauty is especially 

 susceptible to the disease both in nur- 

 sery and in orchard, although scab is 

 said to occur on such varieties as Summer Doyenne, Duchess, 

 Clairgeau, Sheldon, Seckel, Anjou, and Lawrence, while LeConte, 

 Kieffer, and Bartlett are less likely to be affected. 



Symptoms and Cause of Scab 



The disease attacks leaves, twigs, and fruit. The spot on the 

 leaves is characterized by dark olivaceous strands radiating from 

 a center over the leaf surface. The spots may occur on either 

 surface, and while not large they may be so numerous that the 

 entire leaf is covered with them. Badly affected leaves are usually 

 much puckered or curled. On the fruit the spots are similar 

 although the growth is denser (Fig. 324). If the scab becomes 

 extensive on the fruit during its growth, severe cracking results. 



FIG. 324. SCAB ON FRUIT 

 OF PEAR. NOTE CRACKS 

 DUE TO SCAB 



