,rience, the writer is of the opinion that aside from the Ume-sulfur 

 wash these are probably the most promising materials now on the 

 market, of which he has knowledge. To obtain success with them 



^however it seems necessary to apply them as strong as one part to 

 fifteen of water, under great pressure at the nozzle, and to be very 

 thorough in the application. The lime-sulfur wash applied under 

 similar conditions will do as good and perhaps even better work, 



•while used with less care but under the same exact conditions the 

 lime-sulfur wash gave better results. The writer would therefore 



.advise the use of Scalecide or Target Brand Scale Destroyer only 

 where it is not possible to make the boiled lime-sulfur wash, and 

 where a thorough application under the conditions named can be 

 given. 



Other materials which have been tested and which have either 

 given poor results or were worthless so far as these reports go, for 

 the purpose of destroying the San Jose' Scale are, Naphcin, Fruito- 

 lin, Surekil, Tak-a-nap Soap, San Jose Exterminator, Webcide, 

 Standard Disinfectant, Ska-kil, Derror Tree Fluid, Bordeaux Mixture, 



' Whitewash and Crude Carbolic acid. Undoubtedly many others are 



• on the market, but no reports of their value are at hand. 



Conc/iisiofi. From what has been written it follows that where a 



■kettle or steam for boiling is available the lime-sulfur wash properly 

 prepared is the most satisfactory and probably the cheapest material 



'to use. Scalecide or Target Brand Scale Destroyer would naturally 

 be chosen if boiling is for any reason impracticable, and perhaps in 

 some cases would be preferable on account of the trouble to boil 

 where only a few trees or shrubs are to be treated. It should be 

 stated that only the statements of State and Station officials have 

 here been considered in preparing this summary. 



Recom7tie7idatio7is . Where any considerable amount of spraying is 

 to be done, use the lime-sulfur wash prepared according to directions 



^iven below. Where only a few shrubs or trees are to be treated, or 

 where for any reason boiling is not practicable, use Scalecide or per- 

 haps Target Brand Scale Destroyer at the rate of one gallon of the 

 material to fifteen gallons of water, well mixed, applied twice — pref- 



'erably late in the fall and again early in spring before the buds open 

 — with as great pressure at the nozzle as posssible, and applied very 



.thoroughly so that every twig even maybe covered by the spray. 



