20S MAINE AGRICULTURAL EXPERIMENT STATION. ig02. 



something less than 10 per cent of the total yield on most plots. 

 Because of depressions on plots 6-9, the soil was not as well 

 drained and the rot was increased to about 15 per cent. 



The potatoes all had a high starch content, with but little dif- 

 ferences. There was no apparent relation between the starch 

 content and the land of insecticide used. In general the plots 

 having the largest yield had the largest potatoes and the lowest 

 starch content. 



The potatoes from plots which were treated with Paris green 

 at the rate of 8 and 12 pounds per acre and arsenate of lead at 

 the. rate of 16 and 24 pcuncs were tested for arsenic and were 

 found to be entirely free. 



EXPERIMENTS BY MR. ROGERS OF BRUNSWICK. 



Two experiments comparing Paris green, Bug Death and 

 arsenate of lead were made in 1902 by Air. E. A. Rogers of 

 Brunswick. One of these experiments was conducted at Bruns- 

 wick and the other was made for the Danforth Chemical Com- 

 pany in Caribou. Mr. Rogers furnished the Station the full 

 report of these experiments, but as they have been printed in 

 detail m the Maine Farmer only a summary is here given of the 

 experiments and Air. Rogers' conclusions. 



TABLE SHOWING PLAN AND YIELD PER ACRE IN EXPERIME:"! 



AT BRUNSWICK. 



INSECTICIDES L SED, KIVL. 





Yield pee acre nr 



. 



Bushels 





1 









9 







a 



3 









■ s 















- 









g 



ja 







= 



- 



£ = 



ta 



05 



- Bug Deatt. 



3 Arsenate of lead . 



i Paris green. 



5 Bug Death 



I Arsenate of lead 

 7 Paris gTeen 



5 Bnsr Death 



6 Arsenate of lead . 

 10 Paris green 



Arsens 



Par::: s 



Average marketable. 



m 



•115 



11 



16 



15 



3584 



4 



184 



74 



354 



8 



22A 



1-25 



369 



5 



15* 



15 



32; 



7 



204 



74 



135 



330J 

 362 



1 

 f 



184 

 204 



15 



3-20 



14 



23i 

 184 



"3 



279 



1» 



Bnsh. 









3;2 







- 



3354 









3-21| 









442 



381 



3644 



■ * ' - 



355i 



3491 



382f 



344J 



299 



