£60 

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 J 40 



Kesiotances4 



GROWTH OF BURLEY I TOBACCO IN THE 

 PRESENCE OF TWO PRATYLENCHUS Spp. 

 RELATIVE TO SOIL TEMPERATURE 



SOIL TEMPERATURE °F 



Figure 1, This variety is tolerant to P, minytis and sttinting occurs 

 only at very high soil temperatiores. In contrast, the variety is very 

 susceptible to P. penetrans » 



GROWTH OF DELCREST TOBACCO IN THE 

 PRESENCE OF TWO PRATYLENCHUS Spp 

 RELATIVE TO SOIL TEMPERATURE 



FigTir© 2, This variety behaves eocactly as that shown in figure 1, 



