63 



from I to 9 to I to 20 was more effective than the Bordeaux. The 

 curled leaves on the unsprayed trees averaged from about 35 to 60 

 per cent, while on those sprayed with lime sulphur they averaged from 

 I to 6 per cent only. On the trees sprayed with the Bordeaux an aver- 

 age of about 8 per cent of the leaves showed curl. More copper in the 

 Bordeaux might have been more effective. These results are not 

 especially new or striking, as it has long been known that lime sul- 

 phur as applied for scale will also effectively control the curl. They 

 serve, however, to again confirm the results of earlier investigators 

 and to demonstrate to the grower the value of lime sulphur for the 

 control of this disease. This is particularly important, as most 

 growers are now compelled to spray for the scale and any solution 

 that will answer both purposes at the same time means a great sav- 

 ing in time and money. Reports from a large number of peach 

 growers all over the state, last spring, indicate that any of the brands 

 of commercial lime sulphur or the home boiled mixtures used as for 

 scale will successfully prevent the leaf curl. 



Results on Apple Scab. 



The trees selected for these experiments were Rhode Island 

 Greenings. The lime sulphur was used at a dilution of 1-30. The 

 Bordeaux was made to the formula 3-4-50. In each case arsenate 

 of lead was used at the rate of three pounds to 50 gallons of the 

 mixture. Six trees were left unsprayed as checks ; six were sprayed 

 with the Bordeaux and arsenate of lead ; five were sprayed with the 

 Lime Sulphur and arsenate of lead. The two mixtures were ap- 

 plied in each case on the same day, with the same pressure (about 

 125 pounds) and with equal thoroughness. Some of the trees were 



Fig. I. Greenings from the unsprayed check .rees 

 showing the fruit just as it run on the trees. All of 

 these apples were taken from a single limb. All of 

 the injury is not due to apple scab. Insects were re- 

 sponsible for much of the injury. 42 per cent, of the 

 apples on the check trees were affected with the scab. 



sprayed once, just before the blossoms opened. Some were sprayed 

 twice, just before the blossoms opened, and again just after they 

 had fallen. Some were sprayed but once, just after the blossoms 

 had fallen. The results showed that in this orchard this season, the 

 one spraying just after the blossoms fell was the all important one. 

 The trees sprayed only just before the blossoms opened showed 

 nearly as much scab as the checks. This does not indicate, however, 

 that this spraying just before the blossoms open may not often be 



