FOURTEENTH ANNU.IL MEETING. 143 



scab and tlie codling moth. Forty-two trees were in this 

 experiment, consisting of about equal numbers of Baldwins 

 and Greenings. The effects of the treatment upon the codling 

 moth and scab are shown by the following table. 



EFFECTS OF SPRAYS UPON SCAB AND CODLING MOTH. 



Greening. Scabby Wormy 



Per cent. Per cent. 



Check 71-0 46.5 



3 Bordeaux-arsenical mixture 37 7-3 



I Sulphur wash and 2 bordeaux-arsenical mixture .... 4.2 9.8 



I Sulphur wash 55-5 464 



Baldwin. 



Check 95-3 3io 



3 Bordeaux-arsenical mixture , 23.0 6.8 



I Sulphur wash and 2 bordeaux-arsenical mixture .... 14.7 134 



I Sulphur wash 66.5 38.3 



There was an average of 83.1 per cent, scabby fruit upon 

 the checks and 38.7 per cent, wormy fruit as compared with 

 61 per cent, of scabby fruit and 42.3 per cent, wormy fruit 

 from trees treated w'ith the sulphur wash alone, making a dif- 

 ference of 22 per cent, less scabby fruit upon trees sprayed 

 with lime-sulphur washes. Those treated with the sulphur 

 wash, followed by two applications of poisoned bordeaux 

 mixture, had 9.9 per cent, of scabby fruit and 11.6 per cent, 

 wonny fruit, which corresponded very closely with the results 

 obtained in controlling these two pests with the usual three 

 applications of poisoned bordeaux mixture. By far the most 

 satisfactory results were secured by substituting the lime- 

 sulphur wash for the first treatment with the bordeaux mix- 

 ture. This resulted in a reduction of 51.1 per cent, scabby 

 fruit and 30.7 per cent, wormy fruit, as compared with trees 

 sprayed only with the sulphur wash. It is evident from these 

 results that the plan of spraying best adapted for the treat- 

 ment of apple trees for scale, scab and codling moth, is one 

 application of a lime-sulphur wash during the dormant sea- 

 son, followed by the usual second and third treatments with 

 the poisoned bordeaux mixture. 



It may be encouraging to pear growers if we refer briefly 

 to our experience with a lime-sulphur wash in checking the 

 dreaded Pear Psylla. It may be remembered that this pest 

 was exceedingly abundant and destructive in 1903, particu- 



