SPRAYING 319 



6. What determines the kind of spray to be used and its means of 

 application ? 



7. Describe the different kinds of apparatus used in spraying. 



8. What is one of the most destructive insect pests of your locality? 

 one of the worst fungus pests? 



EXERCISES 



Select for experiment a fungous disease or insect pest which is injurious 

 to some of the crops of the community. Write to your state agricultural 

 college for directions in controlling these diseases and pests. Under these 

 directions demonstrations of great importance may be made in the use of 

 such sprays as the Bordeaux mixture, kerosene emulsion, and lime-sulphur. 

 In Appendix I directions are given regarding the kind of spray to use and 

 the time to apply it for various insect and fungus pests. 



REFERENCES 



BAILEY, L. H. The Principles of Fruit Growing. The Macmillan Company. 

 DUGGAR, B. M. Fungous Diseases of Plants. Ginn and Company. 

 LODEMAN, E. G. The Spraying of Plants. The Macmillan Company. 

 SEARS, F. C. Productive Orcharding. J. B. Lippincott Company. 

 STEVENS, F. L., and HALL, G. L. Diseases of Economic Plants. The 



Macmillan Company. 

 Fungicides and Their Use in Preventing Diseases of Fruits. Farmers'* 



Bulletin 243, United States Department of Agriculture. 

 Some Factors Influencing the Efficiency of the Bordeaux Mixture. Bulletin 



265, Bureau of Plant Industry, United States Department of Agriculture. 

 Self-Boiled Lime-Sulphur Mixture as a Promising Fungicide. Farmers' 



Bulletin 440, United States Department of Agriculture. 



