2 

 3. How may pruning increase the growth of wood ? 



4. How may fruit production be influenced by pruning 1 



5. Wliy should you always cut close to the main branch or trunk 

 in pruning off a superfluous branch ? 



6. Why is it desirable to cover the wound with paint or graft- 

 ing wax. 



7. How would you control the canker-worm ? 



8. Give examples of sucking insects. 



9. How would you treat plants infested wnth aphids (plant lice) ? 

 They are found usually on the under side of the leaf. Plums, 

 cherries, apples, snowballs are infested. 



10. How should arsenical poisons be applied ? 



11. How is kerosene emulsion made and what is it used for ? 



12. What is a fungicide ? 



13. What are the ingredients of Bordeaux mixture ? 



414 



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