310 Diseases of Truck Crops 



in potato fields, but not to such an extent as to be 

 noticed. It is always found scattered in individ- 

 ual plants, indicating deterioration. Prevention of 

 this trouble consists in careful selection of seed from 

 unaffected hills. 



Spindling Sprout 



Cause Unknown. 



Spindling sprout is an abnormality common to 

 Southern grown seed, which reduces the yield con- 

 siderably. Instead of healthy sprouts, long, thin 

 slender ones germinate (fig. 58 d) . No lesions of any 

 kind are found on the sprouts or on the seed pieces. 

 A weak tuber will produce only spindly sprouts. Both 

 strong and spindly sprouts are never found on the 

 same seed tuber. The character and the fertility of 

 the soil seem to have no influence whatsoever on this 

 trouble. The only remedy known is the use of 

 Northern grown seed. 



Internal Brown Spotting 

 Cause Unknown. 



This disease is peculiar to the Early Maine and is 

 found in New York, Maine, Connecticut, and Minne- 

 sota. 



Symptoms. Usually the trouble is internal with- 

 out any symptoms apparent on the outside of the 

 tuber. But occasionally its presence is indicated by 



