22 



The Bulletin'. 



If it is desired to make the wash in quantities of less than 50 

 gallons (one barrel) approximately the same proportions of lime, 

 sulphur, and water should be used. 



Notes About the Lime-sulpliur AYash. — This mixture has such a 

 beneficial effect on trees in removing old bark, in killing other insects 

 which may be on the bark (Green Aphis, Oyster-shell Scale, Scurfy 

 Scale, etc.), and in killing the spores of certain fungous diseases which 

 may be present, that we believe it will become very popular as a 

 late-winter treatment, whether trees are infested with San Jose 

 Scale or not. As a precautionary measure it would be well to give 



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Fig. 12.— Peach trees before being pruned back for treatment. Note how difficult it would be to 

 treat all the long, slender twigs. Original. (.Photo by Sherman). 



the orchard a treatment with it everv three or four vears no matter 

 how healthy it may appear to be. 



The Lime-sulphur wash not only kills the scales with which it 

 actually comes in contact, but it forms a thin, firm coating over the 

 twigs upon which the young insects seem to find difficulty in settling 

 down to feed and grow. As this coating is gradually worn off by 

 rains or by growth of the tree, it is important that tlie wash be 

 applied as late in winter as possible so that the coating shall be 

 present when the insects begin to breed in the spring. The best 

 time to treat the trees, therefore, is in late winter — as late as possi- 

 ble so the -work is completed before the buds are much swollen. 

 Trees that are very badly infested may be given two treatments, the 



