526 
Journal of Agricultural Research 
Vol. XI, No. io 
Table IV.— Temperature indexes 
Locality. 
Glomerella cingulaia. 
Fusicoccum putrefaciens. 
Ratio of 
index for 
G . cingulata 
to that for 
F. Putrefa~ 
ciens. 
Index. 
Per cent. 
Index. 
Per cent. 
Grand Rapids, Wis. 
2,371 
5 1 
4,216 
66 
0. 56 
Farmington, Me. 
2, O27 
44 
3,872 
61 
• 52 
Middleboro, Mass. 
2,555 
56 
5 , 3 i 5 
83 
.48 
Indian Mills, N. J. 
4,600 
IOO 
6, 360 
IOO 
. 72 
North Head, Wadi. 
1,896 
41 
6, 067 
95 
•31 
In calculating percentages for purposes of comparison the largest 
indexes, those at Indian Mills, have been considered ioo in all cases. 
COMPARISON OF EASTERN LOCALITIES 
On comparing the three eastern stations it is apparent that the effective 
temperature for the growth of Glomerella cingulate, in New Jersey is nearly 
twice that at Middleboro, and more than twice that at Farmington. 
Temperature differences alone would therefore indicate a very much 
greater growth of fungi having the temperature relations of G. 
cingulate in New Jersey. This difference might not result disad¬ 
vantageous^ if the greater amount of heat could be utilized by the 
cranberry. This, however, does not appear to be the case. In fact, it is 
probable that, as suggested by Shear (8), the higher summer temperatures 
in New Jersey are an actual disadvantage to the cranberry. Certainly 
the summer temperatures at Middleboro are sufficient for the production 
of good crops of cranberries and the abundant growth of vines. Good 
crops of cranberries of excellent quality are regularly produced in New 
Jersey. This, however, may be due to the fact that careful cultural 
methods and thorough spraying more than overcome the disadvantage of 
a slightly unfavorable climate. 
For Fusicoccum putrefaciens the difference in the three localities is not so 
great, the temperature efficiency in New Jersey being less than 20 per 
cent greater than that at Middleboro. On the basis of temperature alone 
one might expect endrot (caused by F. putrefaciens) to be slightly more 
abundant in New Jersey. Apparently, however, it is much more 
abundant in Massachusetts. The writer believes that this is due to a 
greater freedom from competition. 
That these two fungi and doubtless others do compete, even within a 
single berry, is clearly shown by observations made in the fall of 1916. 
Cranberries of the Early Black variety taken from a bog in Wareham, 
Mass., were used in temperature experiments. The few berries which 
rotted at temperatures of 5 0 and o° C. yielded chiefly Fusicoccum putre¬ 
faciens, while those at higher temperatures, 15 0 to 25 0 , yielded chiefly 
Glomerella cingulate. The crop of Early Blacks from this bog showed 
