136 THE CONNECTICUT POMOLOGICAL SOCIETY. 



been more or less of a disappointment in that State the past 

 season. He adds that several chemists are attempting to make 

 a prepared petroleum which will either dissolve in or mix 

 readily with water, and is in hopes that this material will prove 

 a thoroughly satisfactory remedy for the San Jose scale. Our 

 experience with oils, as stated above, indicates that fruit trees 

 in this latitude will not stand yearly applications, and even 

 though' it is possible to make a perfect emulsion, there is still 

 the danger that repeated applications would have a cumula- 

 tive efifect and ultimately result in severe injury. 



Before passing to a consideration of lime-sulphur washes, 

 it may be well in the interests of completeness to refer very 

 briefly to our experiments with a caustic soda solution, a 

 remedy extensively advertised last spring in certain papers. 

 One pound to six gallons of water was employed, and the 

 results at the end of the season were that the trees sprayed 

 with this material were very little better than those unsprayed, 

 and as a consequence in this latitude it can hardly be consid- 

 ered as valuable in checking the San Jose scale. This simply 

 confirms earlier experiments by various workers and is alluded 

 to only because its employment was rather extensively advo- 

 cated early in 1904. Another material which appeared to be 

 promising was a bordeaux mixture to which 2 oz. of corrosive 

 sublimate was added to each 50 gals. This was applied in 

 early spring in the same way as other washes, and the results, 

 so far as we could determine, were no better than those se- 

 ' cured with the caustic soda solution, so far as controlling the 

 San Jose scale is concerned. 



Experiments with lime-sulphur washes were begun in 

 1902 and have been continued both by the State Experiment 

 Station and the writer up to the present time, and in most in- 

 stances the results have been very satisfactory indeed. Por- 

 tions of our earlier work were somewhat unsatisfactory, par- 

 ticularly in the vicinity of Albany, and we now believe this re- 

 sult was due largely to a considerable proportion of the trees 

 having been sprayed with oil the previous year, and as a con- 

 sequence the later application did not adhere in a satisfactory 

 manner. This belief is further supported by the results ob- 

 tained the three following years. The experiments conducted 

 by the State Experiment Station at Geneva have given fully 



