

EXPERIMENTS WITH INSECTICIDES AND FUNGICIDES. 



209 



TABLE SHOWING PLAN AND YIELD PER ACRE IN EXPERIMENT 



AT CARIBOU. 



Insecticides Used, Kind. 



Bug Death 



Paris green 



Bug Death 



Arsenate of lead 



Bug death 



Total average yield per acre for Bug Death 



Total av. (Plot 2) yield per acre for Paris green. . 

 Total av.(Plot 4)yield peracrefor arsenate of lead 



100 

 4 



100 

 8 



100 



Bush. 

 353J 

 321 

 323 



Yield per acre 



in bu 



shels. 



6 





& 



-c 



ei 



a 





a . 



<D 



- - 











S 





279 



66 



247 



74 



282 



77 



245 



78 



303 



53 



345 

 321 

 359 

 323 

 356 



In both of the experiments conducted by Mr. Rogers the yields 

 were considerably larger on the Bug Death plots than on the 

 Paris green or arsenate of lead plots. From the experiments 

 at Brunswick and Caribou Mr. Rogers draws the conclusion 

 that Bug Death was much the best insecticide used ; that it did 

 its work much better and cleaner than either Paris green or 

 arsenate of lead ; that Bug Death preserves the life of the vines 

 and that the increased yield from the use of Bug Death would 

 more than pay its cost. 



In the Station experiments at Houlton, Paris green was the 

 most efficacious of the three insecticides used, although Bug 

 Death at the rate of 15 pounds and arsenate of lead at the rate 

 of 2 pounds to the acre in each application were efficacious for 

 all practical purposes. There was no difference in the appear- 

 ance of the vines due to the different insecticides during the 

 growth, nor in the yield of potatoes. One desiring to use an 

 insecticide for plants free from arsenic will, according to our 

 experience, find Bug Death satisfactory when applied in suffi- 

 cient quantities. Bug Death can be readily applied with Bor- 

 deaux mixture up to 40 pounds to the barrel. According to 

 our experience, 15 pounds per acre at each application is nearly 

 as effective as a larger amount. 



