a small spot, nea in the center, where ie cuticle of the 
has been destroyed, with a dark brown border. Previous to 
between the. light colored central porticn and the dark panden line 
there is deestoned a well defined band of bright vermilli 
Finally, under the action of the disease, the berries begi 
wither and dry up, leaving nothing, apparantly, but the skin 
the seeds. There is no browning of the tissues of the berry as in the 
case of the black rot, nor does the skin shrivel as in that disease, 
leaving prominent and very irregular ridges, but the circular spots 
first formed are easily seen and the colorings characteristic of the 
disease retained. A berry may be attacked upon one side when i 
is not more than one-half grown; it then becomes irregular in 
shape, the diseased part making no further development, and it 
sometimes happens that this side cracks open exposing the seeds, 
which are gradually forced out by the unequal growth of the berry. 
THE PowpEry MILpDEw. 
Uncinula spiralis (Berkeley & Curtis). ei. 
The powdery mildew makes its appearance usually during th 
early days of June, and continues its development late into the 
autumn. Its entire growth is upon the outside of the invaded 
Me 
plant, no portion, excepting the minute suckers, or haustoria, 
which are said to penetrate the epidermal cells, ever entering 
within its tissues. It appears in dull, grayish-white patches, most 
conspicuous on the upper surface of the leaves, and when growing 
thickly on the young shoots or berries, its mycelium imparts to 
these organs a similar hue. It never has the bright lustrous, o 
frosty i Dede that Sa tte. the downy mildew, and th 
whole thickness cr the leaf, visible at the cilia below the palela 
of fungus growth on the surface above. In a few instances as have 
