Report of Entomologists of Experiment Station. 597 



mixed with water, at the rate of one pound of the poison to 150 

 gallons of water.* 



Plot II, containing four and one-half rows, was sprayed with 

 Paris green and water, in the same proportion as in Plot I, but to 

 which whale oil soap had been added at the rate of one pound of 

 the soap to four gallons of the mixture. 



Plot III, consisting of two and one-half rows, was sprayed with 

 extract of pyrethrutn at a strength of two and one-lialf ounces of 

 the extract to four gallons of water. 



Plot TV, consisting of five rows, was sprayed with whale oil soap 

 and water, the soap being used at a strength of one pound of the 

 soap to four gallons of water. 



Plot Y, consisting of five rows, was sprayed with whale oil soap 

 and water, at the proportion used in Plot IV, but to which had 

 been added extract of pyrethrum at the rate of two and one-half 

 ounces of the extract to four gallons of the solution. 



Plot YI, consisting of five rows, was sprayed with one per cent, 

 solution of Lysol. 



Plot YII, consisting of two rows, was sprayed with tobacco 

 decoction, the tobacco being used at the rate of one pound of the 

 tobacco to four gallons of water. 



Plot YIII. This plot included about three acres, and was sprayed 

 with Bordeaux mixture, to which whale oil soap had been added at 

 the rate of one pound of soap to four gallons of the mixture. 



All of the plots, excepting Plot YIII, were sprayed between 

 June 10 and 19. Plot YIII was sprayed a few days later. 



A knapsack sprayer was used in all cases, excepting Plot YIII, 

 which was sprayed with a power sprayer. 



Owing to the scarcity of the beetles the experiments were discon- 

 tinued before final results could be obtained. 



* In each case where Paris green was used the usual amount of lime was added to prevent 

 Jburning. 



