i6 
Colorado Experiment Station 
the egg stage. The eggs are small, black, shiny objects placed upon 
the small twigs of the trees. See Plate 3. 
Remedies .—It is very difficult to destroy the eggs. The sprays 
usually recommended for this purpose cannot be depended upon. The 
best treatments consist in spraying with tobacco extract (19), kero¬ 
sene emulsion (10), or soap (8), after the eggs have hatched, and be¬ 
fore the leaves begin to curl. 
Rosy Apple Aphis .—This aphis or louse gets its name from its 
rosy or pinkish color. It is quite a serious pest to the apple in som« 
sections, but has been found in Colorado in only two or three locali¬ 
ties in sufficient numbers to do serious damage. The small, black, 
shiny eggs hatch in the spring about as the buds begin to open. The 
lice feed upon the leaves and twigs much as the Green Apple Aphis 
does, but they seem to have a poisoning effect on the twigs and truit. 
leaving the twigs crooked and stunted and the fruit small and knotty. 
This pest remains on the apple and pear only a part of the season 
leaving the latter part of June for another food plant. It returns in 
the fall to deposit its eggs upon the apple and pear. See Fig. 7. 
Remedies .—Same as for Green Apple Aphis. 
Fig. 7.—Apples disfigureil by the attacks of the rosy apple aphis when the fruit was 
young. These were picked at harvest time. Reduced one-half. After O. E. Essig, Bui. 
“Injurious and Beneficial Insects of Calif.’^ Calif. State Com. of Hort. 
Grasshoppers .—Grasshoppers do serious damage to young orchards, 
especially when they are sown to some crop that will not permit of an 
