REGULATORY LAWS 33 



name. Within recent years so-called spray guns 

 have come into use. 



ACCESSORIES 



Tower — A tower ten or twelve feet high is a ne- 

 cessity for good work. It enables one to get above 

 the tree and spray down, which is especially neces- 

 sary in case of codling moth. The new Cornell 

 tower has many advantages. 



Hose — There should be plenty of hose to enable 

 one to get all around a tree. The hose should be of 

 a quality to withstand 150 to 200 pounds pressure. 



BORDEAUX MIXTURE «^ 



This is a fungicide with which arsenicals are 

 often combined: 



Bordeaux mixture is made by mixing a dilute solution of 

 copper sulfate (blue vitriol) with a dilute milk of lime. 

 The mixture may be made of different strengths by using 

 different amounts of the copper sulfate and lime to a given 

 amount of v^ater. A mixture made of 3 pounds of copper 

 sulfate and 3 pounds of lime to 50 gallons of water is indi- 

 cated by the formula 3-3-50; one made of 4 pounds of 

 copper sulfate and 4 pounds of lime to 50 gallons of water, 

 by 4-4-50 ; one made of 5 pounds of copper sulfate and 5 

 pounds of lime to 50 gallons of water, by 5-5-50. 



QUARANTINE AND INSECTICIDE LAWS 



Nearly all of the States in the United States have 

 passed laws '^^ governing the shipments of plants 

 and plant products into their territories. These 

 are designed, of course, to prevent the introduction 

 of injurious insects and plant diseases. California 

 has in some instances instituted legal restrictions 

 governing shipments of plants between counties 



69 Cornell Univ. Expt. Stat., Bull. 283, Rev. Ed., p. 466, 1915. 



70 Burgess— U. S. Bu. Ent, Circ. 75. 



