e;IvM IvEaf curl and wooIvLY applk aphid. 251 



or "Killoscale," add the oil directly to the water with a little stirring. 

 One gallon of the miscible oil in 30 to 50 gallons of water will make a 

 mixture, which in most cases will be strong enotigh to kill plant lice, 

 if thoroughly applied. 



Formula D. — WhalE-oil or Fish-oil Soaps. 



The so-called whale-oil or fish-oil soaps which are quite extensively 

 used for the destruction of plant lice, will usually he effective if thor- 

 oughly applied in the proportion of one pound of the soap to each six 

 or eight gallons of water. There are numerous brands of these soaps 

 upon the market. Among those that have been used quite successfully 

 are Good's Whale-Oil Soap and Bowker's Tree Soap. 



In recent years tobacco extracts have rapidly taken the place of 

 other remedies for aphides, and well informed apple growers are using 

 them almost to the exclusion of other insecticides. It should be 

 remembered that this is a contact insecticide and kills only the insects 

 actually touched. It is, therefore, necessary to be very thorough in 

 the spraying. 



