196 Proceedings of Indiana Academy of Science. 
A basal canker bearing the sclerotia of a Sclerotinia was found killing 
one greenhouse plant. 
EGGPLANT. 
Wilt (cause unknown) was present in the market garden where it was 
noted in 1919 but was not as destructive this year. 
GOOSEBERRY, 
Powdery mildew (Sphaerotheca humuli) occurred in Wabash county. 
Specimens of anthracnose caused by Pseudopeziza ribes were received from 
Marion, Indiana. 
GRAPE. 
Leaf-spot caused by the black-rot fungus (Guignardia bidwellii) was 
found abundant in a planting in Morgan county. Downy mildew (/Plas- 
mopara viticola) occurred in White and Pulaski counties and severe fruit 
infection was noted. The disease was also noted on the foliage of wild 
grape at Decker and in DeKalb county. Undoubtedly the wet season 
favored the appearance of this disease. 
KALE. 
Yellows caused by Fusarium conglutinans was very destructive in the 
Indianapolis market gardens. 
LARKSPUR. 
A root and crown rot apparently caused by Sclerotium rolfsiti was found 
near Indianapolis by Dr. W. W. Bonns of the Eli Lilly Company. 
LETTUCE. 
Downy mildew and Botrytis rot were as usual prevalent in the winter 
greenhouse crop. A spotting of lettuce apparently of bacterial origin was 
found rather destructive in a market garden near Indianapolis August 17. 
Nematode root-knot was found in the infested muck soil near Goshen. 
OATS, 
Leaf-spot caused by Helminthosporium avenae was noted near Lafayette, 
May 26. Halo blight caused by Bacterium coronafaciens was found in Lake 
county. The smuts are becoming less abundant owing to the rather general 
practice of seed disinfection. 
ONION. 
Smut caused by Urocystis cepulae (Fig. 7) was again present in the two 
onion set fields in Lake county mentioned in last year’s report but was 
