DRUPACEOUS FRUITS 139 



" In the absence of premature, red-spotted fruit, in the 

 severity of the disease from the outset, and in its rapid 

 progress, it is quite unhke yellows, which is decidedly 

 chronic, and the first slight symptoms of which usually 

 occur in very green and thrifty trees, and are frequently 

 overlooked the first season." 



The treatment is to cut and burn. No carelessness 

 should be tolerated as regards this disease or yellows. 



Little peach. — This seems first to have been publicly 

 noted by Smith in an address in Michigan in 1898,^ in which 

 state it had been of alarming character prior to 1893; since 

 these years it has appeared in New York and New Jersey. 

 The most prominent s>Tnptom is that the fruit remains 

 small, one half to one third the usual diameter, and ripens 

 some 10 to 14 days later than normal fruit, and then with 

 insipid or bitter flavor and " stringy " flesh. The leaves 

 are small, one half normal size, and vary from light green 

 to yellowish green, and droop somewhat. An orchard once 

 affected is of no further value,^ and should be removed 

 and burned because of the possible danger to other trees 

 that their presence creates. 



PLUM 



Black knot {Plowrightia morbosa (Schw.) Sacc). — The 

 black knot receives its name from the swollen black distor- 

 tions, 3-15 cm. long, upon the branches. In a young con- 

 dition the galls are olivaceous, but as the season advances 

 they become darker and eventually coal black. At the 

 same time the texture changes from soft to hard and brittle. 



' Smith, E. F., Fenville (Mich.) Herald, October 15, 1898. 



- Blake, M. A., N.J. Agr. Exp. Sta. Bui. 226, p. 10, January, 1910. 



