Arete ct cum haonN Be leith rollN 21 
ferred between students. Register directly with the university of your 
choice, accompanying the registration blank with your payment. In 
addition, a student information blank should be completed by the student 
and the local school and forwarded to the workshop director at the 
respective university. Each university will acknowledge the registration 
to the student and provide him or her with additional information and 
instructions before the course starts. Make checks payable to the uni- 
versity you wish to attend. Registration Forms may be secured. from 
the Office of the Superintendent of Public Instruction, Springfield, Illinois. 
9. Workshop Information: 
Illinois State Normal University Dr. John Trotter, Director 
June 7 — June 12 
Northern Illinois University 
June 28 — July 3 
July 3 — July 10 
Southern Illinois University 
July — August 
(Six 1-week sessions) 
University of Illinois 
July 19 — July 24 
July 26 — July 31 
Western Illinois University 
July 5 — July 10 
July 13 — July 17 
Conservation Workshops 
Illinois State Normal University 
Normal, Illinois 
Dr. Ross Guest, Director 
Conservation Workshops 
Northern Illinois University 
Dekalb, Illinois 
William Price, Director 
Outdoor Education and Recreation 
Southern Illinois University 
Carbondale, Illinois 
Division of University Extension 
116B Illini Hall 
Champaign, Illinois 
Dean Carlson Crane 
Division of Public Services 
Western Illinois University 
Macomb, Illinois 
All workshops will be held on university campuses and housing 
will be provided in regular dormitory facilities with the exception of 
Southern Illinois University. This workshop will be located at Giant 
City State Park, in connection with their Little Grassy Campus. 
9405 Richfield Road, East St. Louis, Ill. 
FI Ft fT FI 
Vertebrate Resistance to Pesticides 
By Denzel E. Ferguson and Harlan D. Walley 
Rachel Carson’s book, Silent Spring, has generated some remarkably diver- 
gent reactions, even among biologists. One extreme is represented in the 
contention that all uses of pesticides must cease. If this were adopted, 
agriculture would be drastically affected. Crop yields would be greatly 
reduced, and agricultural land would probably revert to the conditions 
that prevailed prior to the advent of the white man. 
The other attitude equally unrealistic, is that pesticides are of such 
great value that all undesirable consequences must be accepted with the 
benefits. This procedure would result in disastrous losses to wildlife, and 
would generate a public health hazard. It is true that the importance of 
agricultural chemicals and their impact upon the biosphere present a per- 
plexing dilemma. The situation demands realism. Until practical alternatives 
to pesticides are available, we must proceed with caution, relying upon 
our best judgment and research to indicate the way. 
