202 MAINE AGRICULTURAL EXPERIMENT STATION. I902. 



nozzle without any difficulty. One enthusiastic user of Bug 

 Death in Maine believes it to be exceedingly valuable as a means 

 of ridding cucumber and squash vines of the striped bug. It 

 will be thoroughly tested by the Station the coming season on 

 the melon family, and if it should prove efficient it will be very 

 valuable, because thus far we have no adequate remedy for the 

 striped beetle. 



In 1900 Bug Death was used by us in the dry form ; in 1902 it 

 was used by us in connection with Bordeaux mixture and applied 

 by spraying. The full account of this experiment is given on 

 pages and, as will be there noted, at the rate of 62J/2 to 



125 pounds per acre, in five applications, it was efficient as an 

 insecticide. The following is the summary of the results of 

 experiments in 1900 as given in Bulletin 68 of this Station. 



1. As an insecticide, at the rate of 100 pounds per acre, it 

 freed from bugs ; at the rate of 40 pounds per acre it had no 

 appreciable effect. 



2. As a fungicide ; blight did not appear so soon or so badly 

 when Bug Death was applied, in three applications, at the rate 

 of 180 pounds per acre, as on untreated vines. 



3. Effect on foliage; at the rate of 40 pounds per acre, no 

 appreciable effect ; at the rate of 100 pounds per acre, some of the 

 leaves curled on the edges and finally died. 



4. Fertilizer ; as its only fertilizer constituent is a little potash 

 with a trace of phosphoric acid, it was not tested as a source of 

 plant food. 



5. Its economy; because of its high cost and slow application, 

 no one growing any considerable amount of potatoes can afford 

 to use Bug Death. 



The results of the experiments described on page seem to 

 warrant a modification of conclusions 1 and 5 so that they will 

 read as follows : 



1. As an insecticide. Applied in a fine spray at the rate of 

 15 pounds per acre at each application, it will free the potato 

 vines from, bugs well enough for practical purposes ; and at the 

 rate of 25 pounds, it is thoroughly efficient as a remedy against 

 the potato bug. 



5. Applied with Bordeaux mixture, it can be as cheaply and 

 as easily applied as Paris green or arsenate of lead. The experi- 

 ments by Mr. Rogers and the Danforth Chemical Company 



