TABLE OF CONTEWTS 



Preface by the Editor 

 I. GENSHAL NEMATQLCXIY 



A. Pathogenicity of nematodes in relation to Pat-h: 1-8 

 Koch's Postulates 



W. B. Mountain, Science Service Laboratory, 

 Harrow, Canada 



B. Principles of population measurement Popul: 1-11 

 F. G. W, Jones, Kothamsted Experimental 



Station, England 



G, Principles of nematode taxonomy Taxon: 1-6 



M. W. Allen, University of California and 

 Agric. Exper. Station, Berkeley, California 



D. Nematode ecology Ecol: l-U 



C. 0. Nielsen, Molslaboratoriet, Femm^ier, 

 Denmark 



E. Specialized microscopy for the study of 

 nematodes 



E. J, Cairns, Alabama Polytechnic Institute 

 and Agric, Exper. Station, Auburn, Alabama 



Micro: 1-16 



II. SELECTED GENERA 



A. Ditylenchus ; races, patnogenicity, and ecology Dityl: 1-7 

 J. W. Seinhorst, Institute voor Phytopathology, 

 Wageningen, Netherlands 



B. Heterodera; life history, trends, host ranges, Heter: 1-13 

 ecology, population studies, root diffusates. 



F. G, W. Jones 



C. Heterodera taxonomy 



A. L. Taylor, Section of Nematology, U. S. 

 Dept. of Agric, Beitsville, Maryland 



D, Heterodera glycines , The present situation 

 J. iM, Sasser, N. C. State College and Agric. 

 Exper. Station, Raleigh, Worth Carolina 



H. taxon: 1-12 



H. glycines: 1-8 



