New York Agricultural Experiment Station. 



151 



Although " Green Arsenoid " instead of paris green was used in 

 the experiment the results may be accepted as applying equally well 

 to paris green. In poisoning properties " Green Arsenoid " is about 

 equal to paris green and the cost of it is but a little less. At the 

 time of making the arrangements with Mr. Fleet to keep the record 

 we understood that he would use paris green. Mr. Fleet makes no 

 report as to the effect on the foliage. We feel confident that " Green 

 Arsenoid " applied at the rate of two pounds per acre must have in- 

 jured the foliage. The danger of injuring the foliage is greater with 

 " Green Arsenoid " than with paris green. 



SUMMARY OF THE BUSINESS EXPERIMENTS. 



The principal features of the six business experiments are shown 

 in the followinsf table : — 



Table IX. — Showing Results of Business Experiments. 



E-xperiment. 



Area 

 sprayed. 



In- 

 crease 

 in yield 

 per 

 acre. 



Total 

 increase 



in yield. 



Cost per 

 A., each 

 spraying. 



Total 

 net profit. 



Jagger 



Salisbury i 

 Salisbury 2 

 Welch .... 

 Martin . . . 

 Dobson. . . 



A. 



13 

 10 



14 



3/2 



5 



Bit. 



54 

 62/2 



64 



76 



78 



7 



Bit. 

 702 

 625 

 896 

 266 

 1222 



35 



$300.09 



272 

 392 

 119 



514 



Total area sprayed, 61% acres. 



Total increase in yield, 3,746 bushels. 



Average increase in yield per acre, 61.24+ bushels. 



Total expense of spraying, $269.49. 



Average expense of spraying per acre, $4.84+. 



Total net profit, $1,576.51. 



Average net profit per acre, $25.77+. 



SPRAYING AS CROP INSURANCE. 

 It is sometimes stated that spraying is, in effect, crop insurance; 

 and since blight is not destructive every season many farmers doubt 

 that it pays to insure in this way. With this idea in mind it is in- 

 structive to make calculations like the following: 



