Walter A. Becker and Michael A. Marsden 



ESTIMATION OF HERITABILITY AND SELECTION GAIN FOR BLISTER 



RUST RESISTANCE IN WESTERN WHITE PINE 397 



PANEL IV. PATHOLOGY AND GENETICS OF TREE RUST RESISTANCE 



Peter SchUtt MODERATOR 411 



Allan Klingstr'dm 



MELAMPSORA PINITORQUA (BRUAN) ROSTR. AND PERIDERMIUM 



PINI (WILLD.) KLEB.— SOME ASPECTS 413 



Victor M. Steenackers 



THE STATE OF KNOWLEDGE IN BREEDING RUST RESISTANT 



POPLARS 419 



Robert F. Patton 



A BRIEF CONSPECTUS OF PATHOLOGY AND GENETICS OF CRONARTIUM 

 RIBICOLA AS RELATED TO RESISTANCE ' 431 



Bohun B. Kinloch 



GENETIC VARIATION IN RESISTANCE TO CRONARTIUM AND 



PERIDERMIUM RUSTS IN HARD PINES 445 



Robert C. Hare 



PHYSIOLOGY AND BIOCHEMISTRY OF RESISTANCE TO PINE RUSTS . . 465 



Eugene P. Van Arsdel 



ENVIRONMENT IN RELATION TO WHITE PINE BLISTER RUST 



INFECTION 479 



Albert G. Kais and Glen A. Snow 



HOST RESPONSE OF PINES TO VARIOUS ISOLATES OF CRONARTIUM 



QUERCUUM AND CRONARTIUM FUSIFORME 495 



Harry R. Powers 3 Jr. 



TESTING FOR PATHOGENIC VARIABILITY WITHIN CRONARTIUM 



FUSIFORME AND CRONARTIUM QUERCUUM 505 



Louis Zufa 



VEGETATIVE PROPAGATION EXPERIMENTS IN WHITE PINE 513 



Raymond J. Hoff and Geral I. McDonald 



STEM RUSTS OF CONIFERS AND THE BALANCE OF NATURE 525 



Peter SchUtt 



PANEL MODERATOR'S SUMMARY: PATHOLOGY AND GENETICS OF TREE 



RUST RESISTANCE 537 



PANEL V. BREEDING SCHEMES FOR MASS -PRODUCTION OF RUST RESISTANT 

 TREES 

 Norman E. Borlaug MODERATOR 539 



Carl Heimburger 



BREEDING WHITE PINES FOR RESISTANCE TO BLISTER RUST AT THE 

 INTERSPECIES LEVEL 541 



X 



