PANEL I 



BASIC BIOLOGY OF RUSTS AND RUST DISEASE RESISTANCE 

 Clayton 0. Person,, MODERATOR 



Peter R. Day 



THE GENETICS OF RUST FUNGI 3 



John W. Duf field 



LIMITATIONS AND ADVANTAGES OF CONIFERS VS. AGRONOMIC 



CROPS AS RESISTANCE BREEDING MATERIALS 19 



William Q. Loegering 



SPECIFICITY IN'" PLANT DISEASE 29 



J. C. Zadoks 



REFLECTIONS ON DISEASE RESISTANCE IN ANNUAL CROPS 43 



Eva Fuchs 



QUESTIONS OF RACE DIFFERENTIATION WORK IN CEREAL RUSTS ... 65 



Michael Shaw 



PHYSIOLOGY OF RUST RESISTANCE 87 



Clayton 0. Person 



MODERATOR'S SUMMARY: BASIC BIOLOGY Or RUSTS AND RUST DISEASE 

 RESISTANCE 93 



