258 FARM FRIENDS AND FARM FOES 



253-254. See if you can distinguish the summer spores and the winter 

 spore cases. 



3. Make a list of the Powdery Mildew diseases that you know to 

 occur in your locality. 



4. Make a list of remedies that are used in your locality to prevent 

 injury by these diseases. 



5. Make sketches of the fungi as seen through the microscope, also 

 of leaves showing spots where the fungus is present. 



Cotton Diseases 



1 . Learn what diseases are most destructive to cotton in your region. 

 Collect specimens. 



2. Read such of these references as your teacher directs : — 



Farmers' Bulletins 302, 333. 



Other Diseases 



1 . How many of the following diseases are you able to find in your 

 locality? — 



Peach Leaf Curl. 

 Plum Pockets. 

 Strawberry Leaf Blight. 

 Brown Rot of Stone Fruits. 

 Black Rot of Grapes. 

 Bitter Rot of Apples. 

 Apple Scab. 

 Pear Leaf Blight. 



2. Write a short account of your observations upon three or more of 

 these diseases. This outline may help : — 



The abundance of the disease. 



The parts of the host affected : whether leaf, fruit, or bark. 



How diseased leaves or iruits look. 



How the fungus passes the winter. 



Preventive measures. 



3. Make sketches showing the characteristic appearance of each 

 disease you write about. 



