INSECTS AND INSECTICIDES 
J 3 
BORERS, PLAT-HEADED. 
(Chrysobothris femorata) 
A whitish grub boring beneath 
the bark of apple and other trees 
and peculiar in appearance in 
seeming to have a greatly en¬ 
larged flat head. Fig. 5. 
Remedies-—Remove with a pocket 
knife whenever found. Protect the 
south side of the trunks of the trees 
BUFFALO TREE-HOPPER. (Ceresa sp.) 
Three-cornered, greenish to brownish insects, about a third of 
an inch in length. They jump when disturbed and puncture twigs 
of trees and stems of plants for the deposition of their eggs. From 
these punctures oval scars result. See Plate 3, Fig. 3. 
Remedies .—Infested twigs may be pruned away and burned during 
winter or spring. Probably clean culture is the best prevention. Keep 
down all weeds and unnecessary vegetation in and about the orchard. 
SAN JOSE SCALE. (Aspidiotus perniciosus.) 
This insect is very easily overlooked and may be present in 
sufficient numbers to kill trees before its presence is discovered by 
the orchardist. They may infest trunk, twig, fruit, or foliage. 
The scale is nearly circular, about one-sixteenth of an inch in diam¬ 
eter, dark gray in color with a darker spot at the center. Anyone 
finding such scales upon any tree should send examples at once to 
the Experiment Station for examination, as there are several spe¬ 
cies closely resembling each other in outward appearance. As yet 
this scale is unknown in Colorado orchards. See Plate I., Fig. 6, 
which shows a closely related species on pear. 
Remedies.— Spray with lime and sulfur mixture (21) while the trees 
are dormant. Or, spray with whale-oil soap (12) in the proportion of two 
pounds to a gallon of water, or with crude petroleum (16) during winter. 
If trees are very badly infested, it will often be best to cut and burn them. 
PUTNAM’S SCALE. (Aspidiotus ancylus .) 
Very closely resembling the preceding species. Central spot 
on the scale reddish. Remedies the same. 
