254 
“ The following operation is what I have 
adopted with great success as a preventive of Mil- 
dew, &c. Just before the bloom expands, the trees 
are sprinkled with water, after which they are 
dusted all over (particularly the young shoots) 
with common sulphur, mixed with a little Scotch 
snuff or tobacco dust. The beneficial eft’ects of this 
practice I have satisfactorily realized for many 
years. However, when a tree is affected by Mil- 
dew, let it be immediately sprinkled with soap 
suds, and then be dusted over with sulphur and 
snuff’ as before described. It is the practice of 
many persons to wash those trees that are affected 
with Mildew frequently with soap suds and urine, 
and other mixtures, which repeated washings tend 
to promote instead of destroying it ; it is also the 
practice of others to renew the soil of the borders, 
but although this is advantageous in some respects, 
it will not be an entire preventive of Mildew, be- 
cause the state of the weather and borders, as 
before described, will affect the tree in some 
degree.” 
Forsyth observes, “ the Mildew, a disease 
veiy hurtful to plants, is a kind of thick clammy 
moisture, which falls on, or rather transpires from, 
the leaves and blossoms of plants. This clammy 
substance, by stopping up the pores prevents per- 
spiration, or hinders the growth of plants. It is 
commonly called Mildew, and there is an insect 
which is frequently found in vast numbers feeding 
upon this moisture.” 
