SPRAYING AND DUSTING APPARATUS 



77 



the mixture. Mixing is best accomplished by machinery con- 

 structed for the purpose. The best means is to grind the ingre- 

 dients together. Until methods of mixing are better standardized 

 it will be wise for the user to get his materials ready-mixed. 



FIG. 56. Another make of duster. (The Dust Sprayer Mfg. Co., 

 Kansas City, Mo.) 



Dry powdered bordeaux mixture is being used to some extent 

 as the fungicide in dusting formulas but is still in the experimental 

 stage. 



Other mechanical devices for applying poisons and controlling 

 insects will be discussed in connection with the group of insects 

 for which they are most used.* 



* For further information concerning the application of insecticides see 

 the following: Farmers Bulletin 908 (U. S. Dept. Agr.) "Information for 

 Fruit Growers About Insecticides, Spraying Apparatus and Important 

 Insect Pests," A. L. Quaintance and E. H. Siegler. 



