354 ROBERT A. SCHMIDT 



In closing, I would emphasize that a greater effort should be made 

 to select fusiform rust-free trees from plantations and natural stands 

 where the incidence of rust is high. At present, many of the candidates 

 in our tree improvement programs were selected primarily on growth 

 parameters and/or from areas of relatively low rust incidence. These 

 trees probably represent a population with a high percentage of disease 

 escapes rather than resistant individuals. 



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