72 maixe agricultural experiment station. 1913. 



Discussion oe Results. 



The results set forth in the above table are so self-evident that 

 very little discussion is necessary. It will be seen that with 

 regards insect control the three different insecticides produced 

 almost exactly identical results. It may be said in this connec- 

 tion that not one of the apples classed as "wormy'' was at- 

 tacked by the codlin-moth but by the lesser apple worm. It will 

 also be seen on comparing the per cents of sound fruit that the 

 two substitutes produced even better results with regard to> 

 russeting than did the arsenate of lead paste, although these dif- 

 ferences are probably within the limits of experimental error. 

 So far as can be judged from the data obtained by this one 

 experiment dry arsenate of lead and arsenate of zinc are fully 

 as effective and are as safe to use as arsenate of lead paste. 

 The results of the experiment, were on the whole so satisfac- 

 tory, both with regards insect control and ease in mixing with 

 the spray liquid, that dry arsenate of lead Avill be used on all 

 the orchards at Highmoor Farm in 1913. 



