INSECTS INJURIOUS TO FRUITS. 73 



Remedies. The best way of avoiding injury from this in- 

 sect is by planting chiefly the pistillate sorts, as these are not 

 affected. In a small way, the rows of staminate plants may be 

 protected by mosquito netting or other covering until the buds 

 are ready to open. The application of insecticides for the pre- 

 vention of injury by this insect have not been especially suc- 

 cessful. 



QUESTIONS CHAPTER III. 

 Insects. 



1. What care should the fruit grower take in suppressing in- 

 sects and diseases? 



2. How have insects and diseases been introduced into the fruit 

 growing sections? 



3. What effect do they have upon the fruit grower's work? 



4. What sections are usually exempt from insects and diseases? 

 Example. 



5. What are the advantages and disadvantages of State In- 

 spection? 



6. What do the State Inspection laws provide for? 



7. What would be the benefit of a national law? 



8. Into what groups may the destructive insects be classified? 



9. What are the habits of each? 



10. What are the remedies best adapted to each group? 



11. Into what groups may the beneficial insects and parasites be 

 classified? 



12. What are the habits of each? 



13. What is the history of the cottony cushion scale In Cali- 

 fornia? 



14. What insects are injurious to the apple? 



15. What is the life history of the Codlin Moth? 



16. What injuries do they cause? 



17. What are the best remedies for this insect? 



18. How does the curculio injure the apple? 



19. What is the remedy for it? 



20. What insects injure the foliage of the apple? 



21. What is the life history of the Tent Caterpillar? 



22. What are the remedies for the Caterpillar? 



23. How do the Tent Caterpillar and fall web worm differ in 

 their habits? 



24. What remedy should be used for them? 



25. What injury does the climbing cut worm cause on the apple 

 tree? 



26. How may it be destroyed? 



27. What insects injure the trunks and branches of the trees? 



28. What is the life history of the flat headed apple tree borer? 



29. What harm does it do? 



30. What remedy is used as a preventive for the injuries caused? 



31. What injury is caused by the twig borer? The buffalo tree 

 hopper? 



32. What is the remedy for the twig borer? 



33. What is the life history of the San Jose scale? 



34. What injury does i.t cause? 



35. What is the remedy for the San Jose scale? 



36. What injury is caused by the scurfy bark louse? 



