Rat 
diameter of the hyphae. Cultures have been made from diseased 
**fruit’’ and shoots obtained from trees in Mortlake, Kew and 
0 
diameter of two or three millimetres. On germination, whic 
usually follows after a considerable resting period, they give 
rise always to Botrytis conidiophores. 
When growing in culture media the fungus is characterised 
by the very protuse development of ‘‘haptera’’ which assume 
an olive-green to grey-black colour. 
A detailed comparative study of the physical and chemical 
relations of the fungus, and the conditions of its virulence is in 
progress, and will form part of the full paper. 
The Disease on the ‘‘Fruit.’’—Infection may eccur at any 
point, but usually the attack commences at the pore, and thence 
grey. Ifa diseased ‘‘fruit,’’ be cut open 1t will be found that 
the central cavity is usually free from mycelium. The fungal 
J 
solution of the cell walls and a collapse of the cells; and advance 
with great rapidity. 
By the time the fig is completely enveloped it has shrunk 
considerably in size, and after a few weeks shrivels to a mummi- 
fied condition (Plate IX., figs. 3 and 4; Plate VIII., fig. 3). In 
this state it often hangs on the tree during the winter, and the 
following spring and early summer gives rise to abundant coni- 
hores. 
The latter arise in clusters from irregular sclerotial masses of 
fruit ’’ a nodular 
mies”? which had overwintered 
on the tree, proved readily capable of reproducing the disease 
co 
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ss 
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pr} 
i) 
= 
Tm 
5 
on both shoot and ‘“‘ fruit. : ‘ : 
On trees which are badly diseased these mummified ‘‘ oe 
are found in great abundance, and on one such tree traine 
against a wall 83 were counted. 
ulated the 
Die-back of the Shoots.—When a shoot is inoc ons, and 
mycelium at first tends to spread equally in all directi 
rapidly encircles the shoot. It then slowly progresses 
in the tissues and more rapidly downwards. ‘The sho 
p ot above 
the diseased area soon dies and usually becomes 
shrivelled and 
B2 
