EXERCISE 140 - FIELD EXERCISE 



Make a diagram representing an area of about two acres or a city block in your neighborhood, and 

 indicate on it the location of every spot or object in which flies do or may breed. 



Questions. 1. What can be done to remove these breeding places ? 



2. Who is responsible for their removal ? 



3. Who should take action to get the responsible persons to remove them ? 



4. At what points in the life history of the fly is it best to attack it for the purpose of extermi- 

 nation ? Why ? 



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