STATK C) 1- ILLINOIS DKPARTMKNT oK Rl (IISTRATK )\ AM) KDll. ATION 



BOARD OF NATIRAL RF.SOl RCES AND CONSFRX ATION 

 William Svlvkstfr Whitl. Chairman; Thomas Park. Ph.D.. Biology; L. L. Sloss, Ph.D.. Ct-o/osy, 



Ph.D., D.Sc. Chemistry: Robert H. .Xnderso.v, B.S.C.K.. Enginaring ; Charles E. Olmsted. 

 \V. L. EvERiTT. E.E.. Ph.D.. Representing the President of the University of Illinois; Delvte W. 

 President of Southern llliniiis I' niver,it\ 



NATURAL HISTORY SURVEY DIVISION, Urbana, Illinois 



SClKNTli IC AND TEL HNR'AL .SIAKF 



Harlow B. Mills. Ph.D., Chief 



IIiKiiKKT H. Ross. Pli.D., Assistant Chief 



Ror.iKi O. Watson. B..S.. Assistant to the Chief 



R.H.L 



Ph.D.. 



MoRRI 



» .\l>A\lS. 



Fnrestr\: 

 s. Ph.D., 



Section of Economic Entomology 



liiciK..! t. DiiMK. I'li.D.. Pnntipal Scientist anil Head 



L H. BlUKR. .\L.S.. EnlO!lll,llJ,^lst 



W H. LiiKMAX.N. Ph.D., Entomologist 



Willis N. Brlce. Ph.D., Entomologist 



John p. Kramer, Ph.D.. Associate Entomologist 



RiiiiARi) .1. DvsART. Ph.D.. Associate Entomologist 



Ronald 11. MtvtR. Ph.D.. Assistant Entomologist 



RocLRT D. Palscii. Ph.D., Assistant Entomologist 



James E. .Xppleby. M.S., Assistant Entomologist 



Joseph W Maddox, M.S., Technical Assistant 



Alglstine Okonkwo, M.S., Technical Assistant 



Dannll McCollu.m. B.A.. Technical Assistant 



David Ke.vnedy. Technical A'sistant 



Sue E. Watkins. junior Scientific Assistant 



\\. B. Petty. Ph.D.. Entomologist in Extension* 



Stevenson Moorl. III. Ph.D., Associate Entomologist in 



Extension* 

 Ci.ARtNtL E. White. B.S.. Technical Assistant in Exten- 

 sion' 

 Amal C. Banerjee. M.S., Research Assistant* 

 Jean G. Wilson, B.-A., Research Assistant* 



Section of Applied Botany and Plant Pathology 



]. e'l 1>RU Carter. Ph.D.. Plant Pathologist and Head 



I. L. Forsherg. Ph.D.. Plant Patholo'^isl 



(i. II. BoEWL. M.S.. Associate Plant Pathologist 



Rodert .\. Evers. Ph.D., Associate Botanist 



RoHERT Dan Neei.y. Ph.D., Associate Plant Pathologist 



E. B. HivELiCK. Ph.D., Associate Plant Pathologist 



Wvlter Hartstirn. Ph.D.. Assistant Plant Pathologist 



D. F. Sc holneheiss. Ph.D.. Assistant Plant Pathologist 



\'i<.<.\ R\iii. T,\hnu-nl Assistant 



Section of Aquatic Biology 



(Jlori.e W. Bennett. Ph.D.. Aquatic Biologist and Head 



William C. .Starrett. Ph.D.. Aijuatic Biologist 



R. W. Larimore. Ph.D.. Aquatic Biologist 



David H. Bick. Ph.D.. Associate Aquatic Biologist 



RoBERi C. HiLTiBRAN. Ph.D., Associatc Biochemist 



Donald F. Hansen. Ph.D., Associate Aquatic Biologist 



William F. CiiiiDERf. M.S.. Assistant Aquatic Biologist 



(JARY Camenisch. M.A., Technical Assistant 



Ken MacMlrdo. Biochemical Assistant 



Maryeran Martin. Technical Assistant 



Robert D. Crompton. Field Assistant 



Michael J. Diever. field Assistant 



Charles F. Thoits. Ill, B..\., Research Associate* 



RoLLiN D. .Andrews. HI, B.S., Field Assistant* 



Larry Bohm, Field Assistant* 



Section of Faunistic Surveys and 

 Insect Identification 



H. H. Ro.-s. Fii.D., Assntani Chul and Head 

 Milton W. Sanderson. Ph.D.. 1 axonomist 

 Lewis J. Stannard. Jr.. Ph.D., Tcxnnonist 

 Philip W. Smith. Ph.D.. Taxonomisi 

 Leonora K. Gloyd. M.S.. Assistant Taxonomist 

 H. B. Cunningham, Ph.D., Assistant Taxonomist 

 Bernice Sweeney. Technical Assistant 

 George L. Rotramel. Technical Assistant 

 Marvin E. Braasch. Laboratory Assistant 

 J.)HN' D. I NzicKER. B.S., Rescttrch Assistant* 

 Tosiiio XWiamoto. B.S.. Research Assistant* 



Section of Wildlife Research 



tiLEN C. Sanderson. I'h.D.. li ildhie Specialist and Head 



F. C. Bn.i.Rosi:. B.S.. llddlKc Specialist 



H. C Hanson. Ph.D.. U'lldiue Specialist 



Richard R. Graber. Ph.D.. Wildlife Specialist 



Ronald F. Lasiskv. .\LS.. Associate li'ildlife Specialist 



William R. Edwards. M.S., Associate Wildlife Specialist 



William W'. Cochran. Jr.. Assistant Wildlife Specialist 



Nancy Kott, B..A.. Technical Assistant 



Richard Bartholomew. B.S.. Technical Assistant 



Howard Crc m. Jr., Field Assistant 



John E. Warnock. Ph.D.. Research Associate* 



Jacr a. Ellis. M.S.. Research Associate* 



Bobbie Jo N'erts. M.S., Research Associate* 



Ralph J. Ellis, M.S.. Research Associate* 



Gerald G. Montgomery. M.S.. Research Associate* 



William L. .Anderson. B.S.. Research Associate* 



George B. Joselyn. \I.S., Research Assistant' 



Steven L. W l nderi.e. B.S., Research Assistant* 



Richard D. Andrews. M.S.. Field Mcmmalogist* 



Gerald L. Storm. M.S., Field Ecologist* 



Terence R. Trocghton, B.S., Field Biologist* 



Da\ ID X. Casteel. B.S.. Project Assistant* 



Ronald L. Westemeiir, B.S., Project Assistant* 



Klith p. Dai phin. Project A tsistant* 



Section of Publications and Public Relations 



James S. Ayars. B.S.. Technical Editor and Head 

 Blanche P. Yolnc;. B.A.. Assistant Technical Editor 

 \L\RGiERiTE M. \erlev. B..A.. Assistant Technical Editor 

 WiiMiK D. Zehr, Assistant Technical Photographer 



Technical Library 



Doris F. Dodds, B..A.. M.S.L.S.. Technical Librarian 

 Patricia F. Stenstrom. B..\., M.S.L.S., Assistant Tech- 

 nical Librarian 



CONSULT .ANTS : Herpetologv, Hobart M. Smith, Ph.D., Professor of Zoology. University of Illinois: Parasitology, 

 Norman D. Levine. Ph.D.. Professor of Veterinary Parasitology and of Veterinary Research. University of Illinois; 

 Wildlife Research. Willard D. Klimstra. Ph.D.. Professor of Zoology and Director of Co-operative Wildlife Re- 

 search, Southern Illinois University ; Statistics, Horace W. Norton, Ph.D., Professor of Agricultural Statistical 

 Design and Analysis. University of Illinois. 



♦Employed on co-operative project? with one of several agencies: L'niver.sity of Illiiiois. Illinois .Agricultural Exten- 

 sion Service. Illinois Department of Conservation. National Science Foundation. L'nlted Slates Deparlment of .Agri- 

 culture. I'nited States Fish and Wildlife Service. United States Public Health Service, and others. 



(S8922— 3M— 2-64) o^^^a 



This paper is printed bv authoritx of the Slate oi Illinois. IRS Ch. 127, Par. ^^.12. It is a contribution from the 

 Section o> Applied Botany and Plant Pathohr^x oi the Illinois Satural History Survey. 



Illinois Natural History Survey Circular 50, May, 1964 



