218 THE BOOK OF VEGETABLES 



to get along with three sprayings should postpone till 

 there is danger of injury from 'bugs 1 or flea-beetles, 

 and then spray thoroughly. . . . There is no excuse 

 for using Paris green alone for ' bugs. 1 Whenever it is 

 necessary to fight insects alone, use Bordeaux containing 

 Paris green." New York Bulletin No. 221. Use four 

 to six ounces of Paris green to every fifty gallons. 



Scab is an underground enemy of Potato, causing the 

 familiar roughnesses of the skin. Against it: (1) Plant 

 on scab-free land. (2) Treat the seed, either with a 

 solution of corrosive sublimate (two and one-half ounces 

 in two gallons hot water ; dilute in ten hours to fifteen 

 gallons) or with formalin (mix eight fluid ounces of 

 formalin ["otherwise known as forty per cent formic 

 aldehyde" Farmers' Bulletin No. 91] with fifteen gal- 

 lons water). Seed-potatoes should be thoroughly 

 washed, and soaked in the solutions, corrosive sublimate 

 for one and one-half hours, formalin for two hours. 

 All seed soaked in corrosive sublimate should be either 

 used or destroyed, on account of the poison. Or roll 

 the seed-pieces in sulphur, three hundred pounds per 

 acre, strewing the remainder of the sulphur in the open 

 row. 



Minor troubles of the Potato are: Tip-burn, leaf- 

 burn, or scald, caused by too wet or too dry weather: 

 spray with Bordeaux and cultivate carefully. The mole 

 cricket, usual on wet land: plant on dry ground. The 

 stalk-weevil : burn infested tops. For the brown rot 



