38 CROP PKST COMMISSION OF 



pump, tlic barrel pump should have all fittings perfectly tight 

 and should have leads of hose from twenty to twenty-five fed in 

 length to which extension rods are attached. Where an exten- 

 sion rod is not readily obtainable a wooden pole may be tied to 

 the hose near the no/xle, and will answer the same purpose as a 

 regular extension pipe, although by no means as convenient and 

 easy to handle. 



In very large orchards it is customary to mount the spray 

 pumps in wagon tanks having a capacity of from 200 to 300 gal- 

 lons so that one load of spraying material will last from two to 

 three hours. This, of course, affects a material saving in time 

 lost by the spray hands. These wagon tanks are not expensive, 

 costing from $10.00 to $20.00, but unless the orchard to be 

 sprayed contains several thousand trees the purchase of such a 

 tank by the fruit-grower is unnecessary. 



After each clay's spraying the pumps and attachments 

 should be well rinsed out with clear water and after the season's 

 spraying is completed all parts of the pump should be thorough- 

 ly cleaned and oiled before being stored away. 



The fruit-grower may occasionally encounter difficulties 

 which are not fully covered in this short discussion of spraying 

 materials and methods. In all such cases the writer will take 

 pleasure in a.nswering fully, free of charge, any inquiry that 

 may be made. 



Summer Treatment for the San Jose Scale. 



As was stated upon a previous page, substances which are 

 corrosive enough in their action to kill the San Jose scale are too 

 strong to be applied to trees while they are in a growing condi- 

 tion. For this reason no treatment is known that will control 

 the San Jose scale effectively, ,if applied while the trees are in 

 leaf or fruit. 



In case of infestations which are discovered in mid-sum- 

 mer and where the infestation is so bad that it appears unlikely 

 that the trees will survive until winter treatment can be given 

 them, the regular lime-sulphur wash described above can be made 

 and applied to the trunks of the trees and to the bases of the 

 lower limbs with a whitewash brush (but must not be applied to 

 the foliage or young growth). This will check the increase of the 

 scale upon these portions, where it is usually most abundant, and 



