LEAF BLIGHT OF THE PLANE-TREE. 



The plane-trees in the Garden grounds have been seriously 



ittacked this season by a fungous disease which causes the leaves 



ind young twigs to die and change color as though scorched by 



fire. During the month of June the disease was at its height 



usuallj 

 A late 

 the fur 



' begin to recov< 

 spring with dai 



:r froi 

 up w< 



iathe 

 epide 



Th 



of the 



Lit the middle of 

 .ble to the grow 

 disease such a 



June, 

 ■th of 



curred here this season 















The 

 by Ley 



fungus (G/oeospc 

 /eillein 1848, b 

 rly forty years 



aften 

 :ack: 



*ard; 

 Pla 



istquumS*. 

 t recognize 

 s. Three 



:c.) was first desc 

 'entalis and Pla 



rribed 

 yun- 



raceme 



>sa of North Ar 



nerica 



l, an< 



i PL 



atanus 



oricntalis of th 



eOld 



World 



. The active ve 



•getati 



ivep 



ortio 



,n (myc 



:elium) of the fi 



ingus 



lives u 



•ithin the leaves 

 patches on the 



twigs 



wigs 



; th. 



s fruitii 

 ; of le 



tig portion appe 

 aves that have 



been 



killed. 



If one of the; 

 aer of dark dots 



;ebro 



i will 



be f 



patel 

 ound 



1 ; thes 



examined with a 



pus- 



tules c 

 which 



ontaining numei 

 when mature a 



Tdh 



itribi 



jted 



olorles: 

 broad. 



s, egg-shaped s t 



1 and 



The 

 plane-t 



inicate the disea 

 effects of the fr 

 f trees already 



mgus 

 weak, 

 ed ui 



other pla 



:ned by . 

 isightly 



lly not 

 for a : 



lasting except i 

 few weeks, then 



n the 

 The 



disappeared. It often happens, also, that many of the branches, 

 especially those near the top of the tree, remain entirely untouched 

 and are able to tide the tree over the period of attack with very 

 little loss. 



Not so, however, during a season like the present one, when 

 every tree, in all its branches, appears to be infested with an ex- 



