EXERCISE 86 



FUNGI WHICH CAUSE PLANT DISEASE 

 Materials. Fungi collected on field trips ; books of reference. 



Directions for work. Study and describe as many kinds of 

 fungi as may be found in field trips. Many of these may be 

 identified with considerable certainty by inquiry and by refer- 

 ence to books. 



Study and describe each with reference to the folio whig points: 



1. General appearance on plant. 



2. Type and extent of damage produced. 



3. Means by which host may be infected. 



4. Prevention of infection and destruction of parasite. 



References 



BERGEN and CALDWELL Practical Botany, pp. 221, 223, 226-234, 



240-247. 

 BERGEN and CALDWELL. Introduction to Botany, pp. 239-245,252-256. 



Books for Identification 



DUGGAR. Fungous Diseases of Plants. Ginn and Company. 

 STEVENS. The Fungi which cause Plant Disease. The Macmillan 

 Company. 



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