178 



Proceedings of Indiana Academy of Science 



with Cercospora apii and this may account for the greater destructive- 

 ness of the latter under Indiana conditions. 



An unmistakable mosaic disease (fig. 6) was noted in two fields 

 near Indianapolis on September 7 in the Golden Self-blanching variety. 

 In one field numerous scattered cases were observed. The trouble is evi- 

 denced by a characteristic mottling, crinkling and extreme distortion 

 of the leaves. This disease has recently been described by Poole.' 



Cherry. — Burkholder reported that leaf-spot, due to Coccomyces 

 hiemalis, was Very severe as usual in southern Indiana and that in 

 unsprayed orchards defoliation was very nearly complete by the first 

 of August. 



Clover. — Mains reported that the rusts, Uromyces fallens on crimson 

 clover and U. trifolU on white clover, were not as prevalent as in 1920. 

 Leaf-spot, due to Cercospora viedicaginis, was found near Indianapolis 

 on July 13. Powdery mildew was conspicuous on clover in many local- 

 ities during the fall, due largely to the wet weather. 



Fi.tt. fi. CfU'iy mosaic. Leaves thickonod and greatly distorled. 



Root rot troubles with clover have frequently been reported from 

 southern Indiana. Death of the crop in many fields early in the spring 

 was reported from Harrison County and whether this was due to root 

 rot, anthracnose or other causes is not known. In March, specimens 

 of a root rot were received from Owen County and a Fusai'ium was 

 cultured from a number of roots. This trouble may possibly be identical 

 with a Fusarium root rot recently reported from Ohio (39). Mosaic 

 (12) was noted in Marion, Kosciusko, Orange and Tippecanoe counties, 

 usually on red clover. In Marion County it was noted on sweet clover 

 and at Lafayette on alsike clover. Attempts to transfer this disease 

 to soybeans were unsuccessful. Dodder was reported very bad in clover 

 fields in Tippecanoe County and vicinity. This season seemed especially 

 favortible to dodders and the large yellow patches were noted in abund- 

 ance on wild vegetation along river banks. 



" Poole, R. F. Celery mosaic. Phyto])atholoKy, 13, 151-154, 1922. 



