WAR ON FIELD AND GARDEN PESTS 231 



pounds each of copper sulphate and lime to 50 gallons 

 of water." 



Regarding lime-sulphur, Prof. Brooks says: "It 

 proved a satisfactory substitute for bordeaux in most 

 cases. It caused little or no injury, and in some seasons 

 controlled the diseases as well as bordeaux. In 1910, 

 two sprayings of lime-sulphur were entirely inadequate 

 to hold scab in check. When diseases are serious and 

 the season a rainy one, more applications of lime-sulphur 

 will be required than of bordeaux. As a poison for in- 

 sects, arsenate of lead is the only thing that has proved 

 satisfactory for use with lime-sulphur. The iron sul- 

 phide mixture gave good results the one season it was 

 used, and is apparently worth further trial. The Bald- 

 win is apparently more susceptible to spray injury than 

 the Mcintosh. 



"The number of sprayings required will vary with the 

 season and the diseases and general care of the orchard. 

 The removal of all cankers will greatly decrease the leaf 

 spot, and the destruction of the fallen leaves is of value 

 in controlling both scab and leaf spot. The application 

 of a strong fungicide before the leaves are out, and one 

 of a regular strength just before the flower buds open, 

 will decrease the number of sprayings needed later." 



