228 Diseases of Truck Crops 



carefully unloaded into cars which are iced, if the 

 melons are to be shipped long distances. When the 

 cars have been properly filled, they should be dis- 

 patched as early as possible. Freight agents should 

 see that cars are not delayed on the road. 



DISEASES OF THE CUCUMBER (Cucumis 



sativus) 



Cucumbers, like cantaloupes, are subject to vari- 

 ous diseases which render them unfit for the market 

 or for pickling. 



Mosaic or "White" or "Little Pickle" 



Cause unknown. 



Mosaic has been found in Wisconsin, Michigan, 

 Indiana, Ohio, Iowa, Illinois, Vermont, New York, 

 Louisiana, New Jersey, Minnesota, Massachusetts, 

 and Virginia. 



Symptoms. The first sign appears as a yellow 

 mottling near the stem end of the fruit. Later the 

 light areas are found all over the cucumber, and the 

 darker portions frequently form protuberances. 

 Some fruits retain their green color and show the dis- 

 ease only by being distorted. The leaves too be- 

 come mottled, light to dark green (fig. 40 a), and 

 sometimes wrinkled; the stems and petioles too are 

 dwarfed and distorted. Affected leaves die prema- 

 turely and are replaced by others, which in turn con- 



