INOCULATION OF WESTERN WHITE PINE WITH BLISTER RUST 



365 



Figure 4. Early inoculation tests using vegetable-bin mist 

 sprayers suspended above and between two nursery beds. The 

 inoculum consists of infected Ribes vis oo sis simian leaves, 

 still on the bushes, with the freshly cut stems merely 

 plunged into the moist soil. 





Figure 5. Standing water 

 maintained on seedlings by 

 intermittent hand misting. 

 The paper barrier in the 

 foreground is an attempt to 

 curtail edge drying. 



