342 
J. J. TAUBENHAUS 
of Gloeosporium officinale. Similar results were also obtained when 
the sassafras was inoculated with spores from the spice bush Gloeo- 
sporium. The checks remained healthy. This seems to prove that 
the Gloeosporium from the spice bush and Gloeosporium officinale 
E. &. E. from the sassafras are one and the same. In previous papers 
P have attempted to show that Gloeosporium officinale E. & E. is 
the same as Gloeosporium fructigenum Berk, of the apple, since it 
produces typical symptoms of bitter rot of the apple and also infects 
the sweet pea, producing the typical symptoms of anthracnose. In- 
oculation experiments were carried on with the spice bush Gloeospor- 
ium on apples in the orchard, and on sweet pea seedlings. The results 
obtained were the same as those above stated with Gloeosporiuip 
officinale E. &. E. This seems to prove that the Gloeosporium from 
the spice bush is identical with Gloeosporium officinale of the sassafras 
and that both are one and the same with Gloeosporium fructigenum 
Berk, of the apple whose perfect form is known as Glomerella rufo- 
maculans (Berk.) S. & v. S. The spice bush and particularly the 
sassafras are so widespread in the lower part of Delaware that they 
are being considered as weeds. The apple is well adapted to this soil 
and climate and it is rapidly gaining a high rank in the agriculture of 
the State. In view of these facts, it is important to exterminate both 
the spice bush and the sassafras and thus prevent them from harboring 
and carrying the bitter rot fungus to the apple. 
Summary 
A new Gloeosporium disease of the spice bush (Benzoin aestivale) is 
recorded on both fruits and tender leaves. 
The spice bush Gloeosporium is an active parasite. 
The spice bush Gloeosporium is the same as Gloeosporium officinale 
E. &. E. from the sassafras {Sassafras variifolium) as proved by cross 
inoculations. Both the Gloesporium from the spice bush and Gloeo- 
sporium officinale appear to be the same as Gloeosporum fructigenum 
Berk, which causes the bitter rot of the apple, since each may infect 
both the apple and the sweet pea. 
Delaware College Agricultural Experiment Station, 
Newark, Del. 
3 Taubenhaus, J.J. A study of some Gloeosporiums and their relation to a sweet 
pea disease. Phytopathology i: 196-202, 1911. A further study of some Gloeo- 
sporiums and their relation to a sweet pea disease. Phytopathology 2: 153-160, 
1912. 
