190 THE GRAPE. 
JULY. 
MILDEW. 
As this pest to the grape-grower commences — de 
structive effects with the first damp and mu: ather 
in this month, and, if not timely checked, will cians 
destroy the hopes of the cultivator, the subject requires 
more than a passing notice, and at the risk of being 
thought tedious, we again repeat an auiceaioen: This 
intruder is a fungoid plant, strictly parasitical in its na 
ture, requiring a living organism upon which to com- 
mence developing. It is also entirely dependent upon a 
peculiar state of the atmosphere, otherwise the sporules 
or minute seeds which float unperceived in the air, cannot 
vegetate. The first indication of mildew is manifested by 
spots on the leaves, generally along the mid-ribs 
and larger reticulations. The fleshy parts, so far as affeet- 
od, are = Sayed: —_ — -~ this, the 
: white down 
on the under side of the leaf. In this state tho spores _ 
are ripe for future growth; and so quick is this action, 
that in two or three days they will spread over a great 
_ part of the leaves and fruit, causing the entire vines to be 
_irreparably injured for the season. — 
_ Our own native kinds, such as Isabella, &c., having a 
