310 Gardening 
the effect of bean blight. How is it controlled? What is the 
“black rot” of cabbage? Describe the effects of the downy 
mildew of cucumber. 
How is Bordeaux mixture prepared? What are the general 
rules for using this fungicide ? 
Describe the appearance of a tomato plant affected by the 
tomato-leaf blight. How is the disease spread? How is it 
controlled? What is a “damping-off” disease? How is it 
prevented? Describe the appearance of the corn-smut fungus. 
How can the spores be prevented from spreading? What is bean 
anthracnose? What are the methods of control? 
Why is there no one means of controlling all plant diseases? 
What are the sanitary measures of controlling [plant diseases? 
How does crop rotation assist in keeping plant diseases in 
check? How may seeds be treated for diseases they are carrying ? 
Why should children never attempt this work alone? Whatare 
the general principles involved in using fungicides? How are 
disease-resistant varieties of crops developed ? 
Things to Do and Observe 
1. To learn to recognize the symptoms of the various diseases of 
garden vegetables. Watch for the earliest appearance of a plant 
disease. If at any time a plant looks as if it were diseased, try 
to learn what disease it is, either by referring to a garden book 
or by asking an experienced gardener; or, if you cannot find out 
in any other way, send specimens of diseased plants to the state 
agricultural experiment station for identification, and ask for 
information. In this way you will get into the habit of watch- 
ing for the appearance of disease in your plants and you will 
know just what to do as soon as you recognize the disease. 
2. To learn how to control plant diseases. Secure bulletins 
from your state department of agriculture on the diseases of 
garden vegetables and their control. Consult the local dealer as 
to the kind of sprayers and fungicides he sells. Inquire among 
gardeners as to which of these are most effective. . 
