RESPONSE OF PINES TO TREE RUST ISOLATES 



499 



MISSISSIPPI ISOLATE NUMBER 

 I 2 3 



a LOBLOLLY 



nun 



I SLASH I 



II II II El 



6 12 



12 6 12 



AGE (MONTHS) 



SURVIVING 



6 12 



GALLED 



Figure 2. Gall development on pines inoculated with four 

 Mississippi isolates of Cronartium fusi forme. 



