282 
PESTS OF ORCHARD AND SMALL FRUITS 
The life round in this species is different from that of the spring 
canker-worm. The full-grown larva enters the soil to transform, but 
Fig. 408.— Eggs of the Fall 
Canker-worm. Enlarged and 
natural size. Original. 
the adults emerge in the fall, instead 
of the spring. The female is wingless, 
and at once climbs the trunk and lays 
her eggs. These eggs remain over win- 
ter. They hatch in the spring, with 
the opening of the apple foliage. 
Spraying with arsenical poisons will 
control this species. If it is desired to 
control the pest by banding, it will be 
necessary to apply bands in the fall, 
so as to prevent the females from 
crawling up to the higher parts of the 
tree, and to renew the bands in the spring to prevent the young 
worms from ascending. The females, if stopped in the fall by bands, 
will lay eggs below the ob- 
structions, and thus further . 
banding at the hatching sea- 
son in the spring is essential. 
The Currant Spanworm 
(Cymatophora ribearia Fitch) 
This worm is one of the 
loopers or measuring worms. 
Fig. 410.— Adult of the Currant Span- 
worm. Original. 
”? 
Fie. 409. — The Currant Spanworm. 
Slightly enlarged. Original. 
It is a little over an inch long 
when mature, is light yellow- 
ish or cream colored, and dot- 
ted with black. The worms 
appear in early spring from 
eggs laid on the stems the 
previous summer by the par- 
ent moth. When they are 
very abundant, the foliage is 
destroyed by them. 
