172 MAINE AGRICULTURAL EXPERIMENT STATION. I9OO. 



field. The piece was divided in this way into 14 plots of 16 

 rows each with 2 plots of shorter rows at either end. The short 

 rows were untreated except that Paris green and whitewash 

 were sprayed on these July 27th so as to kill most of the bugs. 

 The arrangement of the plots and their treatment is shown in 

 the following plan : 



ARRANGEMENT OE PLOTS. 



Each plot consisted of 16 rows about 30 rods long. The rows ran east and west. 

 Row 1 at north end. 



No. of 

 rows. 



Kinds of Insecticides. 



£** 



Ito 17 



17 to 32.... 

 33 to 48.... 

 49 to 64.... 

 €5 to SO ... . 

 81to96.... 

 97 to 112... 

 113 to 128 . . 

 129 to 144.. 

 145 to 160 . . 

 161 to 176.. 

 177 to 192.. 

 193to20S.. 

 209 to 224.. 



Paris green 



Boxal (arsenate of lead as the poison) 

 Boxal (arsenate of lead as the poison) 



Paris green 



Paragrene 



Paris green 



Swift's arsenate of lead 



Arsenoid No. 2 



Paris green . 



Arsenoid No. 3 



Paris green 



Arsenoid No. 4 



Arsenoid No. 5 



Paris green 



DATES OE APPLICATION. 



The insecticides were applied under the immediate oversight 

 of the writer, with water together with a fungicide, either Bor- 

 deaux mixture, or other similar materials, in the form of a fine 

 spray at the folowing dates : 



July ii, rows I to 128; July 13, rows 129 to 224; July 21, 

 rows 1 to 224; July 27, rows 1 to 224; August 10, rows 1 to 112, 

 and August n, rows 113 to 224. 



The experiment was visited by the writer at least once a week 

 during the growing season, and two or three days after each 

 application each plot was carefully examined and full notes taken. 



