200 SPRAYING MATERIALS 



QUESTIONS 



1. Discuss the importance to the orchardist of a knowledge of spray 



materials. 



2. Under what conditions is it best for the orchardist to prepare his own 



spray mixtures? 



3. What are some of the objections to the use of Bordeaux mixture? 



4. Describe the preparation of stock solutions for Bordeaux. What is 



the advantage of these solutions? 



5. Describe the making of Bordeaux mixture from these stock solutions 



6. What is commercial lime-sulphur? How is it used? 



7. Describe the home-made lime-sulfur concentrate. 



8. Tell how to make self-boiled lime sulfur. 



9. Give the advantages of arsenate of lead as an insecticide. 



10. Give directions for the use of Paris green. 



11. What are miscible oils? 



12. Why are oils especially valuable in killing scale insects? 



13. Give the formula for kerosene emulsion and describe the methods oi 



preparing and using it. 



