262 Rki'Ort of the Departmext of Entomology of the 



with a resin wash and the remainder with a whitewash known 



as government whitewash. Both have been suggested as being 



effectual against the San Jos6 scale. They were made after 



the following formulae: 



Resin Wash. 



Resin ICA pounds 



Soap 21 pounds 



Fish oil 1% quarts 



Water 21 gallons 



Boil the resin, soap and fish oil in about one-fourth of the 

 water until dissolved. While boiling, gradually add remainder 

 of the water. Care should be taken not to add the cold water 

 too fast as it has a tendency to precipitate the resin. 



Government tcliitcicash. 



Slaked lime ^4 bushel 



Salt % bushel 



Rice 6 pounds 



Glue 2 pounds 



Water 10 gallons 



Boil the rice with enough of the water to make a moderately 

 thin paste. Dissolve the glue in a small amount of hot water 

 and boil the salt and lime in what is left of the ten gallons of 

 water until a thin whitewash is formed. Then add the rice and 

 glue solutions to the whitewash and boil for at least half an 

 hour. 



Weather during tests in Table XI. — Spring treatment. Trees 

 sprayed April 12. Temperature 47°, fair. Weather during the 

 week following usually fair with average temperature of 51°. 



Table XL — Treatments in Orchard V. 



Trees. 



