196 Proceedings of Indiana Academy of i^cience. 



A basal cauker bearing the selerotia of a Sclerotinia was found killing 

 one greenhouse plant. 



EGGPLANT, 



Wilt (cause unknown) was present in the market garden where it \vas 

 noted in 1919 but was not as destructive this year. 



GOOSEBERRY. 



Powdery mildew { Sphaerotlieca humuli) occurred in Wabasli county. 

 Specimens of antliracnose caused by Psendopeziza rihes were received from 

 Marion. Indiana. 



Leaf-spot caused by the black-rot fungus (Guignardia Mdwellii) 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. 



Yellows caused by Fnftariiiin congJittiiifuis was very destructive in the 

 Indianapolis market gardens. 



LARKSPUR. 



A root and crown rot apparently caused by Sclcrotium rolfsii was found 

 near Indianapolis by I>r. 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. 



Leaf-spot caused by Helminthosporium avenae was noted near Lafayette, 

 May 26. Halo blight caused by Bacterium coronafaGicns was found in Lake 

 county. The smuts are becoming less abiuidant owing to the rather general 

 practice of seed disinfection. 



Smut caused by Urocystis cepiilae (Fig. 7) was again present in the two 

 onion set fields in Lake county mentioned in last year's report but was 



