210 THE SPRAYING CAMPAIGN 



are several broods of the codling moth it may be necessary to 

 spray four or five times for that insect alone. Or if the scab is 

 especially troublesome it may be necessary to spray twice before 

 the blossoms open ; or if the cnrculio is especially bad it may be 

 necessary to make a special application for that pest a week or 

 ten days after the fourth spraying detailed above. For these 

 and other special sprayings the orchardist must study his own 

 special conditions and consult local authorities. 



For peaches and plums it is not usually necessary to spray 

 in the autumn, but the program would be as follows : 



First spraying, lime-sulfur of winter strength before the 

 buds swell, for San Jose scale, leaf curl and brown rot. Be sure 

 that this is applied before the buds even begin to swell as other- 

 wise the leaf curl will not be conti'olled. Some experimenters 

 have even applied this dormant spraying in the autumn with 

 good results. 



Second spraying, with self-boiled lime-sulfur when the fruit 

 is the size of the end of one's thumb, principally for the brown 

 rot. In sections where this brown rot or monilia is particularly 

 bad it is recommended to make three sprayings for it with the 

 self-boiled lime-sulfur, the first about a month after the petals 

 have fallen, the last about a month before the fruit is ripe, and 

 the second about half way between these two. 



Cost of Spraying. — It remains to say a w^ord about the cost 

 of spraying. This is an item which varies so much that it might 

 show better judgment to omit the discussion of it altogether. 

 But it is hoped that the following figures, like others that have 

 been given, may be at least suggestive. 



A block of 53 bearing Baldwin trees, probably thirty years 

 old, was sprayed for San Jose scale, using an outfit consisting 

 of a team and three men at a combined cost of 87% cents per 

 hour. 



Time, 71/3 hrs. @ 871/2 cents (cost of labor) %GM 



Materials 431 gal. spray (Oil 1 to 12 = 321/^ gal., @ 3.5 cents) 11.38 



Total cost $17.94 



Labor cost per tree 121/2 cents 



Material cost per tree 211/2 cents 



Total cost per tree 34 cents 



