CIECULAE 3 6 5, IT. S. DEPARTMENT OF AGRICULTURE 



Tests were made on a number of plants to determine whether they 

 would serve as hosts for this scale. Eggs and crawlers were 

 scratched from heavily infested camphor-tree twigs into small paste- 

 board boxes, which were then fastened to the twigs of the plant 



Figure 2. — Typical injury to camphor-tree from severe scale infestations. 



under observation and allowed to remain for 24 to 48 hours. In- 

 festations started in this way on two young apple trees developed, 

 in less than 3 years, to the point where the younger twigs were being 

 killed back. Muscat grapes showed numerous dead twigs within 1 



