622 Report op the Entomologists of the 



During the past two years an efifort has been made to find some 

 substance that would aid in making poisons adhere to the leaves 

 of cabbages and rutabagas. It is known that Bordeaux mixture 

 does fairly well, provided it can be made to adhere uniformly 

 to the surface of the leaves when applied. It is also known that 

 soap suds forms a film on the leaves which adheres well until a 

 rain occurs. . 



Resin-lime Mixture. 



The best substance tried is a resin mixture which has been 

 used on the Pacific coast, and to some extent in other parts of 

 the country, against scale insects. This resin mixture is in real- 

 ity a liquid resin soap. It is made by dissolving a definite quan- 

 tity of resin in oil and water, and then saponifying it with potash. 



The formula as usually given is: 



Pulverized resin, 20 pounds. 



Fish oil, 3 pints. 



Caustic soda or potash, 5 pounds. 



Water, 100 gallons. 

 A mixture as strong as this is not needed, and, as a large quan- 

 tity of the mixture is rarely needed, the following formula is a 

 more convenient one: 



Pulverized resin, 5 pounds. 



Fish oil, or any cheap animal oil, 1 pint. 



Concentrated lye, 1 pound. 



Water, 5 gallons. 



It takes about two hours to make this mixture. The oil and 

 resin should be placed in a kettle and heated slowly until the 

 resin is softened, then add one gallon of hot water, after which 

 the solution of potash or concentrated lye should be carefully 

 added. The mixture should be stirred while adding the lye. 

 The concentrated lye should first be dissolved, according to direc- 

 tions given on the can for making hard soap. After the lye has 

 been added, add four more gallons of hot water and allow to boil 

 until the mixture will mix with cold water, making a clear amber- 

 colored liquid. 



