LtH'UnliKIJMIUM. 



237 



suffered by it should, where other soil condition- permit. In- 



planted with Wevnionth pine (Piims Strobus) and the I>ouglas 



fir (Pxi't/i/t>f.-i/i!f<i I)nii</l,i.-<ii), which are, as yet, exempt t'n>m 



attacks of this parasite. Infect iun would >eem to he brought 



about chiefly by westerly winds (in (lermanyi, which carry 



diseased leaves or fungus-spores from infected 



places. Large areas run greater risks than 



small patches or youn- trees naturally sown 



out. Seed-heds of Scots fir should not be 



placed under the drip of older trees of the 



-a me kind, particularly if this fungus is 



known to exist there. Shelter- belts of other 



trees often afford much protection from this 



disease. 1 



Lophodermium macrosporum Harti-- 

 (Ili/^i rin Hi). (U.S. America). Scab or rust 

 of the spruce. This disease exhibits itself 

 in various ways. Freijuently the needles of the precedm- 

 \e;tr turn brown in spring, and peritheeia are produced in 



KM.. 1-Jl. 1. I 



<>ii 

 Sjirui '. i v. Tul'i-iif del.) 



'J, /./l'. ' 



"pIUCl'. (.\ 



Rostrup.) 







^ 



Kn.. I'J-. /. - 



a]."lh.-Tiuiu. (.Al'l' r fl II 



>uiiiiner, ivacliiii'j mat urii \- on t \\ i >-\ ear-old needle^. A'jaiii. the 



needier of the t Wo-y ca I'-ol 1 1 >hoot s become broWll ill allllimil. 



and peiiihceia ap|>ear on them in the tolli. \\ing summer, 



in I'IM- Somervilli > 



l'i event : re din u.ss< <l in 



ti .-in-l.-il ion i,| H. -i i 1 1 . /' /', |i. I l.'i. 



I: lluti \Vi<-l'i"i> A 'r-iiiUi' il' ii </. \Vnl<llniinr, 



