52 SPRAYING CROPS 



will be found of great advantage. This is the time 

 also for treatment for San Jose scale. 



April Put all spraying apparatus in thorough 

 order. Clean and riiase pumps, oil all bearings, see 

 thai the valves work well, and test the tubing for leaks. 

 If the winter treatment has been deferred until this 

 month, see that it is finished before the middle of 

 the month. 



May This is usually the flowering month for 

 vines and fruit trees, and the first application of 

 Bordeaux mixture or other fungicide should immedi- 

 ately precede the opening of the flowers. Use your 

 own judgment. Apples are generally in bloom by 

 the second week in May ; quinces, pears, and grapes 

 usually not until somewhat later. The importance of 

 these early treatments can hardly be overestimated. 

 Watch to see when the petals begin to fall ; and make 

 a second application within a few days of that date. 



June The first part of June usually marks the 

 fall of the flowers of most fruit trees. Never spray 

 while trees and vines are in full bloom. Make the 

 second application as soon as the petals have fallen. 

 This will be late in May or early in June, for apples ; 

 a week or ten days later for other fruit trees and 

 grapes. Make the June treatment thorough. . . . 

 A good general rule to follow after the second spray- 

 ing is to let each additional treatment be made from 

 ten days to three weeks after the preceding one; the 

 shorter interval if there are heavy washing rains; the 

 longer if the weather is comparatively dry. 



July This month will close the treatment for most 

 diseases. To avoid the spotting of grapes by the Bor- 

 deaux mixture, the two applications during the latter 

 part of this month should consist of the ammoniacal 

 solution of copper carbonate. Early in the month 



