1920 21 



DEPARTMENT OF LANDS AND EOEESTS. 



225 



1919, and a few elsewhere. While the experiment is not yet complete an extensive 

 and valuable body of information is being accumulated and some important con- 

 clusions may be drawn from the data in hand. 





• .^ 



"1»:'"*iife 



White pine witli needle blight to right of centre; healthy white pine to left. 



The blight was especially severe in 1918; there was a slight improvement in 

 1919 with few new cases; the improvement in 1920 was pronounced. Observations 

 to date show that trees up to six inches in diameter are likely to recover with 

 an amelioration of conditions; but the death rate in older trees is much higher, 



15 L.F. 



