336 
Journal of Agricultural Research 
Vol. II, No. s 
vations, “the fungus produced more numerous, as well as more promi¬ 
nent, fruit bodies. The spores were somewhat smaller and the spots 
lighter colored. In these respects the disease resembled more closely 
material collected by Hals ted and labeled Phyllosticta hortorum.” It 
appears evident from Smith’s second article that he regarded Phyllo¬ 
sticta horiorum identical with Ascochyta lycopersici. If his conclusions 
are accepted, Phyllosticta hortorum , having the priority, would be 
Ascochyta hortorum (Speg.) Smith. 
Voglino (1907) in Italy worked with a fungus on eggplants which he 
thought to be the same as that described by Spegazzini as Phyllosticta 
hortorum. By a series of inoculation experiments with spores of an 
Ascochyta found on Solanum melongena he was able to induce infection on 
Physalis cdkekengi , Solanum nigrum , 5 . dulcamara , Lycopersicon esculen - 
turn , Datura metel , and A trope belladonna. Voglino agrees with Smith that 
the fungus previously described by Spegazzini as Phyllosticta hortorum is 
Fig. i.—S ome microscopic characters of the fungus Phomopsis vexans: a , Pycnospores; 6,conidiophores; 
c, styiospores. 
an Ascochyta— Ascochyta hortorum (Speg.) Smith—and devotes consider¬ 
able space to a discussion of his reason. To this species must be referred, 
he says, lt Ascochyta lycopersici Brun. (A. socia Passerini), A. solanicola 
Oudemans, A. atropae Bresadola, A. alkekengi Massalongo (A. pedemon- 
tana Perraris), A. physalicola Oud. and perhaps A. prinzalensis B. and K.” 
The writer has made a careful morphological study of the fungus 
identified as Phyllosticta hortorum and collected from the following places: 
Glen Cove, N. Y. (collected by Pries and identified by Whetzel); Stark- 
ville, Miss. (Tracy); Lincoln, Nebr. (Heald); New Brunswick, N. J. (col¬ 
lected by Halsted and identified by Seymour and Parle). The pycnidia 
in each case were typical of Phomopsis. Specimens collected by Melhus 
at Madison, Wis., in 1912, already referred to, were examined and found 
to be a Phomopsis. The pycnidia on specimens from the different locali¬ 
ties were more or less beaked, flattened, or irregular in form. They were 
covered with a thick, black wall (PI. XXIX, fig. 2) which becomes 
thinner and less noticeable at the base. The conidia (fig. 1, a) were 
1-celled, with mostly two, sometimes three oil droplets 1 ; the coni- 
1 In rare cases spores might be found, the contents of which appeared divided, but if they were treated 
with a solution of salicylic acid, the division would frequently disappear, showing that the spores are con¬ 
tinuous. The apparent division is merely caused by two vacuoles or oil globules which meet at the center 
of the conidia. 
