F-504093 
FIGURE 31.—Oystershell seale, 
Lepidosaphes ulmi, on bark of 
poplar. 
COURTESY CONN. AGR. EXPT. STA. 
FIGURE 32.—Pine needle _ scale, 
Phenacaspis pinifoliae, on nee- 
dles of red pine. 
Pine needle scale infestations (fig. 32) are occasionally so heavy 
that infested trees present a gray, unhealthy appearance. Heavy 
infestations cause the needles to turn yellow and may kill parts of 
branches or entire young trees. Damage is particularly noticeable 
and troublesome on ornamental plantings in or near towns and 
cities. The twice-stabbed lady beetle is an important enemy of 
the species. 
110 
