Some Insects Attacking the Peach. 13 
a small amount of soap. Without the soap the sulfur will remain 
on the surface of the water, while with the soap it will sink to the 
bottom of the spray tank, and a good agitator will keep it mixed. 
Lime and sulfur has not proven a successful treatment for red 
spider, and cannot be depended upon to do effective work when 
used as a dormant spray. 
The use of tobacco preparations, as with the brown mite, re¬ 
sult in little good. 
TWO PLANT LICE OF THE PEACH 
By C. P. GILLETTE and GEORGE P. WELDON 
the green peach aphis (.Myzns persicae Sulz) 
This is the common green peach louse so prevalent early in the 
season curling the leaves and often attacking the blossoms and 
forming peaches in a most destructive manner. 
This insect was quite fully treated and figured in its natural 
colors in Bulletin 133 of this Station, by Gillette and Taylor. Copies 
of this bulletin are still available for those requesting it. 
How the Winter Is Spent .—The eggs of this species of plant 
louse are deposited on peach trees, (occasionally on other stone fruit 
i,trees), in the fall, where they remain unhatched until early spring. 
Their detection is not as easy as that of the com¬ 
mon green apple aphis egg, but is not extremely 
difficult when one knows where to look for them. 
Last fall the eggs were deposited in such large 
numbers that they could be easily found in a 
great many orchards. In some cases the bud* 
of peach twigs were dotted black with them. 
Usually these eggs are deposited on, or very 
close to a bud, (See Fig. 4), and very often just 
as deep in wrinkles or depressions as possible, 
and unless they are plentiful, it may require 
sharp eyes to detect them. When first deposited, 
the eggs are light green in color, turning black 
after exposure to the air. They are much smaller 
than the eggs of the common green apple aphis, 
wrich nearly every orchardist has seen, but are 
quite similar in shape, color and general appear¬ 
ance. This pest may live over winter on vegetation that remains 
green throughout the winter season, so there would be a possibility 
of trees becoming infested at least late in the season from other 
sources, even though the eggs were all killed by an insecticide, 01 
failed to hatch because of unfavorable weather conditions or other 
causes. 
