40 
Colorado Experiment Station 
species of plant lice. These vary somewhat in appearance and habits, 
but are all subject to the same treatment. Use contact sprays, as kero¬ 
sene emulsion (lo), tobacco (19), or soap (8). 
ORNAMENTAL PLANTS 
Rose 
Plant Lice. —The rose is subject to the attacks of several species 
of plant lice. 
Pemedies.—\Jst contact sprays (10), (19), (8), being careful to 
spray the under side of the leaves where most of the lice will be found. 
Sazv Fly. —This is a greenish-yellow larva about one-half inch in 
length when fully grown, that eats the upper surface of the leaves leav¬ 
ing only the veins and lower epidermisi. The adult is one of the saw 
flies very similar to the adult of the pear and cherry slug. 
Remedies. —See under Pear and Cherry Slug. A strong stream if 
water will wash many of the larvse from the leaves. 
Leaf-Hopper. —The rose is quite commonly attacked by leaf- 
hoppers, closely related and very similar to the species attacking the 
apple and pear. For description and remedies, see under Apple and 
Pear Foliage. 
The young wingless hoppers can be washed off the foliage with a 
strong stream of water and many of them killed. 
Rose Scale. —This is a snow-white, nearly circular scale about 
one-tenth of an inch in diameter. It often infests blackberries, rasp¬ 
berries, and dewberries, as well as roses. See Fig. 34. 
Fig 34.—The Rose Scale on wild blackberry. Only slightly enlarged. After O. E. 
F.ssig. “Injurious and Beneficial Insects of California.’’ Calif. State Com. of Hort. 
Remedies. —Spray during dormant season with No. 8, 16 or 17, 
The soap should be rrsed one pound to one gallon of water. 
Virginia Creeper 
Bi^kt-Spotted Fore.ster. —See under Grape. 
The Achemon Sphinx. —A hairless caterpillar that feeds upon the 
foliage. It resembles the large tomato “worm.” When small it has 
a long spine on the last body segment. When nearly full grown the 
