144 
Journal of Agricultural Research 
Vol. VIII, No. 4 
experiment in obtaining the average rot were also counted at the first, 
even though the record was zero. 
The comparative behavior of the different fungi is shown in figures i, 
2, and 3. The base line shows the temperature in degrees centigrade; 1 
the perpendicular the diameter of the rots in millimeters. The curves 
are based on the average weekly increase in the diameter. The results 
given in figure 1 were obtained 
from inoculations made on 
March 27, 1915; those of fig¬ 
ures 2 and 3 from inoculations 
made on January 21,1916. 
In the first series of experi¬ 
ments the moist chambers 
were placed at once at the 
temperatures desired; in the 
second they were allowed to 
remain at 20° for 24 hours 
before removal to the storage 
temperatures. A study of the 
curves will* show that some of 
the rots started off more rap¬ 
idly at o° and 5 0 in the second 
series of experiments than in 
the first, but different varie¬ 
ties were used in the two sets 
of experiments, making it im¬ 
possible to attribute the con¬ 
trast entirely to difference in 
time of storage. The effect 
of delayed storage will be dis¬ 
cussed later in the paper. 
It may be noted that some 
of the curves in figures 2 and 
3 are relatively high at 5 0 . As has already been mentioned, the top of the 
5 0 chamber was i° warmer than the bottom. During the last experiment 
this box was used for the storage of other fruit, sometimes resulting in the 
placing of some of the experimental fruit in close proximity to warm 
1 Temperature equivalents: 
°c. 
°F. 
°c. 
°F. 
°C. 
°F. 
30 
86 j 
IS 
59 
5 
41 
2S 
77 
10 
50 
0 
32 
20 
68 
2 Abbreviations used in text figures; A\t.=Alternaria sp.; Bot.=Botrytis cinerea ; Ceph.= Cephaloihecium 
roseum; Fus ,—Fusarium radicicola; Glo. = Glomerella cingulata; Neo.= Neofabraea malicorticus; Pen.= 
Penicillium expansum; Pes.=Pestalozzia funerca; Pho.=Phoma pomi; Scl. =*Sclerotinia cinerea; Sph.= 
Sphaeropsis motorum; Tri.=*Trichoderma sp.: V o\,= V olutella frucii. 
Fig. i.— Graph showing the development of rot on Ben Davis 
and York Imperial apples. The curves show the average 
weekly increase in diameter and are based on records taken 
two weeks after inoculation . 2 
