lO 
Colorado Experiment Station 
posited in the cavity. The fcK>d punctures are similar to those made by 
the plum curculio. The cells about the punctures are destroyed, the 
growth stops and a deformed apple is the result. The female seals 
the egg punctures with excrement and does not cut a crescent- 
shaped mark about them, as does the plum curculio. There is but one 
brood a season. 
Spraying with arsenicals will destroy a few of the curculios, but 
best results are obtained by destroying all hibernating places and cul¬ 
tivating the soil. They are always worse in thick, unpruned and uncul¬ 
tivated orchards. 
San Jose Scale .—If an apple or pear tree is infested with this pest 
the fruit is very likely to show scarlet blotches about one-eighth of an 
inch in diameter, in the center of each of which will be found one of 
Fig. 3.—The San Jose scale on pear and willow. Note the roughened surface of the 
pear. Natural size. (After O. E. Essig, “Injurious and Beneficial Insects of Calif.” Calif. 
State Com. of Hort. 
