239 



Infections of every kind wen; found at varyinj^- distances from 

 this badly infected tree. Fifty feet away, two saplings, six 

 inches in diameter, were found, npon climbing, to be infected, 

 and the only sign of the blight at a distance was a cluster of dead 

 leaves on a terminal shoot. On climbing, a blister about four 

 inches in diameter was found, but pustules had not been formed, 

 the infection having been caused probably late last summer. 

 This lesion was about ten feet from bhe very tip of the leader. 

 It was found to be girdled and pustules were present at the 

 beginning of last year's growth. 



A short distance away a little to the southeast, a small tree, 

 six inches in diameter, was found infected only at the base. 

 Another tree one hundred feet west in the cut-over area was 

 badly infected. This tree was dead, having been girdled with 

 an axe, and the ring of bark removed; but the blight was fully 

 developed and the bark Avas covered with pustules above the 

 portion of the tree girdled by the axe. 



The largest center was found on the Keefer tract (see map). 

 Here twenty-three trees, all saplings, were found on a circular 

 spot fifty yards in diamter. Only one other tree was found 

 outside this center, and that at the extreme southern end of the 

 tract. 



Another center less than a quarter of a mile east from the 

 first center described, was found on the line between Hamm 

 and Stuempfle, and the most badly infected tree was one 10 to 

 12 inches in diameter, to which the wires of the fence were 

 nailed. The tree was dead, and the tunnels of borers and the 

 larvae in them w^ere found. This tree showed very well the 

 appearance of the blight on old bark, and from it several good 

 sections were obtained. Around this tree the young sprouts 

 and two saplings, four inches in diameter, were badly infected. 



The strip was worked, in the manner indicated, and when a 

 center was found, every tree within a varying radius depending 

 on the size of the center was carefully examined until no more 

 trees could be found that were infected. Often at the outer 

 limits of one center the edge of another center would be en- 

 countered, and this new spot would be studied in the same way. 

 Here and there, scattering cases of infection were found, not 



