New YorRK AGRICULTURAL EXPERIMENT STATION. 257 
peated on large watermelon plants in the field, using “ spores 
taken from the pinkish crust on watermelon rind. In two weeks 
many leaves showed characteristic spots, the vine stalk showed 
discolored zones here and there.” 
In order to obtain perithecia “numerous specimens of dis- 
eased rind” were collected and put into a wintering cage, but 
the Colletotrichum remained unchanged, and no perithecia 
appeared. 
RESUME OF SMITH’S WORK" ON A “ LEAF- SPOT ON 
CUCURBITS.” 
Mr. Smith notes the abundance of a “leaf-spot ” of cucurbits 
on the leaves and fruits of squash and pumpkin, and “to a 
limited extent on the leaves of cucumber and cantaloupe.” He 
thinks it identical with the watermelon leaf-spot disease caused 
by Phyllosticta citrullina Chester.** “On the leaves of various 
cucurbits, there appeared a leaf-spot which was quite similar 
onthe different species. This appeared as dead spots from 
0.5-1 inch (1-2 cm.) in diameter. . . . It is thought these 
spots may be associated with the melon anthracnose, Colleto- 
trichum lagenarium, but no conclusion can be drawn that the 
two are connected in any way. The disease is also found on 
the vine. Plate I, E.”1> “The fungus on the stem forms a 
whitish area which is darkened with blackish specks, the 
pycnidia, Plate I, E.’’** ‘The spores are hyaline, oblong or 
oblong-elliptical, uniseptate bodies . . . vary somewhat in 
size and are not always septate and probably never all become 
so.”17 In pure cultures they were found to be mostly continu- 
13 Del. Exp. Sta. Bul 70 (1905), Newark, Del. 
4F. D. Chester, Bul. Torr. Bot. Club 18: 373-4 (1891), also Del. Exp. 
Sta., 5th Ann. Rpt. pp. 75-9. 
% Del. Exp. Sta. Bul. 70, p. 4. 
16 Reproduced in this Bul. as fig. E of Plate III. The negative was borrowed 
from Del. Exp. Sta., through the kindness of Dr. Mel. T. Cook, Mycologist 
at that station. 
NIG, tes 
9 
