148 
Journal of Agricultural Research 
Vol. VIII, No. 4 
The minimum temperature for some of the fungi seems to be practi¬ 
cally absolute, but for others it varies with the length of time the experi¬ 
ment has run. Fusarium radicicola was unable to develop at 15 0 and 
Glomerella cingulaia at io° even after long periods of storage. Neo- 
fabraea malicorticis and Penicillium expansum had produced no rot at io° 
Fig. 5.— Graph showing the development of the 
rot caused by Fusarium radicicola on Yellow 
Newtown apples. 
Fig. 6 . —Graph showing the development of 
the rot caused by Glomerella dngulata on 
Yellow Newtown apples. 
at the end of two weeks nor Sphaeropsis malorium at 15 0 at the end of 
one week, but later all made a fair growth at o°. At the end of two 
weeks Alternaria spBotrytis cinerea , and Volutella fructi had made no 
evident growth at 5 0 , but later developed at o°. Sclerotinia cinerea was 
the most active at low temperatures of any of the fungi tested, making 
Fig. 7.—Graph showing the development 
of the rot caused by Neofabraea malicorti¬ 
cis on Winesap apples. 
Fig. 8.—Graph showing the development of 
the rot caused by Penicillium expansum on 
Winesap apples. 
a fair growth at o° by the end of the second week. Further data on the 
behavior of the various fungi at o° will be given under the heading of 
commercial cold storage. 
Fusarium radicicola had an optimum at 30° or above; Glomerella 
dngulata , Sphaeropsis malorum , Sclerotinia cinerea , and Volutella fructi 
