302 THE CITRUS FRUITS 



11. What is the value of washing citrus fruits? In what solution is the 

 washing done? 



12. Discuss the grading of citrus fruits. 



13. Discuss the packing of the lemon, grape fruit and orange. 



14. Discuss the principal diseases and give the methods of control. 



15. What class of insects is the most injurious to the citrus fruit? Why? 



16. Discuss the fumigation of a citrus orchard. 



17. Why is fumigation used instead of spraying? 



18. When is the best time to fumigate? Why? 



19. Discuss the various ways of controlling the different diseases on the 

 citrus fruit. 



