5 
steps can 
_ epiphytal and the endophytal. The former includes those fungi which 
2 a being to destroy the parasite without injury to the host-plant. 
: may give as examples the hop mildew and the oidium of the vine, 
2 : ee ere 
_ ‘Septum, at which it is constricted, and this upper cell, of an elliptical 
iain by is differentiated. This process goes on until a chain of 
produced from the original branch, the apicai conidium being 
Q : coni i . . . 
by opt the surface of the mycelium in readiness to be transferred 
‘ rain to other and healthy leaves. Upon reaching its new 
on, 
he germ threads becoming 
This is the ascigerous, and probably sexual repro- 
Pinal career of these epiphytal parasites is therefore external 
Aves and, if they can be destroyed by powdering or spray- 
idi vane? recover their vigour; but if not, by the destruction 
Hsease ig heh ', sporidia, or by their germination bemg prevented, the 
Mts r¢ “a 0g its extension to other leaves or other 
Wentary kno rare e. The cultivator who possesses sufficient 
Ss to-de with, 'dge of the fungi to determine whether the pests he 
t them hare of this nature is already in po ion 0. 
eased ee ectually. Even the very crude method of picking off 
8 and burni nfection. 
z 
5 Si BB is 
