186 PESTS OF GARDEN AND FIELD CROPS 
The Celery Leaf-tier, or Greenhouse Leaf-tier (Phlyctenia jerrugalis 
A variety of garden and field crops including celery, , tobacco, 
and others are damaged by this insect. In ac aon it is injurious on 
plants grown under glass, and chrysanthe- 
mums. 
ng within. 
with a green stripe thaves the middle of the back. The head is light 
brownish, and is marked with dark ¢ 
Since the ms must 
be applied ea Paris green or arsenate 
] 
It 
ead may be us is advisable wherever it can 
be practi economi 
the silk cocoons of the pupe 
4 
ggling worms 
inch, emerges in 
