4 BULLETIN 1032, U. S. DEPARTMENT OF AGRICULTURE. 
An attempt has been made, however, after a long series of fre- 
quent observations, to determine as closely as possible the approxi- 
mate dates when these stages occur in their greatest abundance. 
These dates are presented, therefore, in Table 1 for the earliest grow- 
ing varieties, such as Early Black and McFarlin, and for the latest- 
growing varieties, such as Howe. There seems to be considerable 
variation in the growth of the varieties belonging to these two classes, 
the height of each stage in the growth of the latest varieties gen- 
erally coming a month after that of the earliest varieties. 
Table 1. — Phenology of the cranberry on unflowed bogs on the Pacific coast, 
based on observations at Seaview, Wash., 1918 and 1919. 
Stage of development. 
Approximate date 
of occurrence of 
the height of each 
stage on— 
The ear- 
liest va- 
rieties. 
The la- 
test va- 
rieties. 
"Finds breaking and new growth heannnin? to push forth. 
Apr. 6 
Apr. 10 
May 12 
June 9 
June 30 
May 7 
New upright growth i inch to J inch long 
May 14 
Blossoms in ' ' hook stage " 
June 30 
Blossoms falling and berries setting 
July 30 
Such local influencing conditions as depth of vines, depth of the 
underlying peat, or protection from the strong northwest wind which 
commonly blows during much of the early growing season will, of 
course, cause wider local variations than those here given. The 
limits of each phenological stage are even more variable than the 
height, it being not uncommon, for instance, to find blossoms on some | 
vines as early as May 12 and on others, many not yet fully opened, by 
July 15. An early spring, too, would have the effect of somewhat 
advancing the dates given in this table and a late one would prob- 
ably delay the early stages a little, but the later stages, such as bloom- 
ing and setting of berries, would probably be delayed to a less extent. 
INTRODUCTION OF THE BLACKHEAD FIREWORM INTO THE 
NORTHWEST. 
Although the blackhead fireworm is found on the wild cranberry 3 
as far as 2 miles from any cultivated vines, the severest infestations 
in Washington and Oregon are on bogs planted originally with vines 
from Wisconsin, New Jersey, and Massachusetts. A study of the 
history of the cranberry industry on the Pacific coast and of the 
8 Specimens growing wild in southwestern Washington were submitted to Dr. F. L. 
Pickett, of the Washington Agricultural Experiment Station and were determined by 
him as the common western cranberry, Oxycoccus (oxycoectix) intermedins, with the 
following note: "This is a little coarser than the small cranberry of the East, and 
bears slightly larger berries." 
