io The Colorado Experiment Station. 
ing their eggs, applying repellants for the same purpose, and mound¬ 
ing the soil up above the crown of the tree. This last named method 
is valuable in that where it is used the larvae may be induced to enter 
the trunk of a tree some distance above the surface of the ground, 
then when the mound is removed the worms are high on the trunk, 
where they can be much more easily destroyed than if they were 
lower down. 
scale insects. 
It is very fortunate that none of the scale insects have as yet 
been found abundantly on peach trees in Colorado. The San Jose 
scale has been seen on a very few trees, but not plentiful enough to 
do any serious injury. This pest seems to confine its attacks more 
to the apple in the few orchards where it has been found. 
In one section of the Grand Valley a scale insect closely allied 
to the dreaded San Jose is found. Samples of this scale were sent to 
Prof. T. D. A. Cockerell, Entomologist in the State University at 
Boulder, who kindly determined it for me as the putnam scale. Only 
in rare cases has this insect been found doing serious injury. 
There are other scales of minor importance that are sometimes 
found on peach trees; all of these insects may be successfully com¬ 
bated with an early spring spray of lime and sulfur, or soluble oil. 
If Rex lime and sulfur is used it should be diluted by using I part 
of the Rex solution to io parts of water. A good home-made lime 
and sulfur is as effective as the Rex, and should be made with 20 
pounds of lime and 15 pounds of sulfur to 50 gallons of water. 
Soluble oil is ordinarily used at a strength of one part of the oil to 
from 15 to 20 parts of water. 
While spring spraying for the control of these scale insects is 
probably more advantageous than a spray at any other time, good 
work can also be done with a fall application. Very often orchardists 
would rather spray in the fall because there is more time to do so 
than in the spring. 
the brown mite (Bryobia pratensis Garman) 
In Bulletin 152, of this Experiment Station, an account was 
given of the life habits and injuries from this species of mite, and 
also the red spider. As this bulletin is still available it will not be 
necessary to again give a detailed account of these two pests. 
This mite passes the winter almost entirely in the egg stage. 
These eggs are tiny, red spherical-shaped, glassy objects, usually 
deposited in or near crotches of the branches. Hatching takes place 
in the spring. At first the young mites are red in color and have 
only six eggs. Upon feeding for a short time moulting takes place, 
after which the mite is olive green, or brown in color, and has eight 
legs more or less tinged with red. , It feeds principally upon the 
leaves, occasionally attacking the fruit, and may be detected by the 
