THE HALL SCALE ERADICATION PROJECT 3 
and the United States before the original infestation was discovered, a 
subsequent survey has failed to show that they carried any infestation. 
Since the discovery of the scale, all hosts have been vacuum-fumigated 
before being permitted to leave the garden. 
HOST PLANTS AND INJURY 
The hosts on which the scale has been found in this country are limited 
to the genera Prunus and Amygdalus, and the shrub Spereae veztchiz. Pre- 
ferred hosts include almonds, peaches, nectarines, plums, and prunes (fig. 
2,3). Pomegranate (Punica granatum) 1s recorded as a host in the literature 
Figure 3.—Hall scale on peaches, showing blotches caused by scales. 
