PLATE 60 



A. — ^A 2-year-old seedling of Juniperus virginiana growing under field conditions, 

 typically affected by red-cedar blight. The light-colored parts are the ones which 

 have been killed. X M- 



B. — Thuja orientalis: a, inoculated at wounds in outer cortex with single spore 

 cultures of Phoma sp.; b, control. Location of wound indicated by X. The killed 

 parts of the inoculated plants are indicated by a shriveled condition and light color. 

 When placed imderabell jar, fruitsof the Phoma sp. were obtained on the killed parts. 



(540) 



