ON THE FTJNGOID DISEASES OF THE TINE. 
121 
simple or multilocular. The spores are oval, and variable in form 
and diameter; they are frequently elongated, and acuminate at 
their point of insertion. 
The form, the dimensions, the nature of the spores and of the 
mycelium, the diameter of which in all parts is ten times greater 
, than that of the corresponding parts of the parasite which causes 
the Anthracnose, prevents the supposition that these two diseases 
of the Yine can have any relation to each other. The grapes are 
not attacked by the Anthracnose in any definite spot, but it is near 
the point of attachment this new disease first appears. By this 
peculiarity alone we are enabled at a first glance to distinguish 
between the two diseases. 
“ It is probable that the Yine disease of Etampes ought to be 
referred to the Cladosporium , which developes itself at the expense 
of the living plant in the same manner as that species which pro¬ 
duces the speckled appearance on pears, and which has lately been 
studied by M. Prillieux. Our species appears to be identical with 
Cladosporium viticolum, Ces. (B-abh. Eung. Ex., No. 1877). This 
species does not appear to be of rare occurrence in our vineyards. I 
have met with it several times both in the plain of Montpellier and at 
Cognac during the numerous excursions I have made through the 
Yine district when engaged in my researches on the Phylloxera. 
“ The Yines cultivated in these districts have general cottony 
leaves, and the parasite, which is found on the lower surface of 
the leaf, always covered with a thick down, forms greyish spots; 
these spots are caused by the abundant spores mixed with the 
hairs twisted together. The presence of these grey spots is 
perhaps the only character indicating the existence of this fungus, 
of which the bad effects appear to be easily overlooked. I have 
never observed any bunch of grapes attacked and blackened like 
those I received from Mons. Blavet. Perhaps the development of 
the Clados r porium i nx\<\. of the Anthracnose, maybe attributed to the 
unusual rainful of this year, and which may make these species 
formidable in wet seasons. 
“ I do not hesitate to consider the development of the Clado¬ 
sporium as the cause and not as the effect of the disease. This 
last hypothesis will not stand examination. The Cladosporium is 
developed on plants in perfect health, and on portions which are 
not in the least decayed. The same is the case with Cladosporium 
dendriticum , which attacks Pear trees, and which may serve to 
corroborate what I have just stated. 
