QUESTIONS 95 



8. What materials may be used for treating seed potatoes for the control 



of scab? Give directions for treatment. 



9. How may weevils in seed peas or beans be killed? What precautions 



must be taken in handling the material used? 



10. WTiat is the general method of controlling insects in greenhouses? 



11. What three classes of enemies to vegetable crops can be controlled by 



spraying? 



12. How may the chewing insects be killed? What poisons are used? 



13. How does a sucking insect obtain its food? How may it be killed? What 



materials are used? 



14. What is the natiu-e of a fungus? How may fungous diseases of vegetables 



be controlled by spraying? What material is commonly used? 



15. Give directions for the making of Bordeaux mixture. 



16. Give directions for preparing Paris green for spraying. 



17. How is arsenate of lead prepared for sprajdng? 



18. In what two forms may white hellebore be used? 



19. How much is ''Black Leaf 40" diluted for spraying plant hce? 



20. State the most important general principles of spraying. 



