4] 
sparrows will clear some thousands of insects during 
the day, and woe be to the Rose-chafer that comes 
within their sight. 
Disrases.— Mildew. This fungus is the most 
troublesome of all diseases to which the Rose is 
subject, and of late years has been much more 
prevalent than formerly. The late Mr. Knight, in 
writing upon it, says, “The secondary and _ inter- 
mediate cause of this disease has long appeared 
to me to be the want of sufficient moisture from the 
soil, and excess of humidity in the air, particularly 
if the plant is exposed to a temperature below 
that to which they have been accustomed. If damp 
and cloudy weather in July succeeded that which 
was warm and bright, without the intervention of 
sufficient rain to moisten the ground to some depth, 
the crop is generally much injured by mildew.” 
There can be no doubt as to the truth of these 
observations, but latterly this disease appears to 
have become more prevalent, and seems to bafie 
all our skill to ward it off, much more to eradicate 
it. Some sorts of Roses are much more liable to 
it than others, and some are even so badly affected 
by it, that it is next to impossible to keep them in 
health and free from it throughout the season. A 
good remedy is flour of sulphur. This should be 
applied the very moment the least sign of the 
disease makes its appearance, otherwise it will not 
arrest its progress. The best instrument for apply- 
ing it is the sulphurator; this excellent little 
machine will distribute it evenly throughout every 
part of the plant, which it is impossible to do with 
