Indiana Plant Diseases, 1921 175 



Specimens were sent to Carsner at Riverside, Cal., who reported that 

 the disease was not curly-top. The disease does not resemble the mosaic 

 described by Bobbins (36) but may be identical with another disease 

 mentioned by him in his account of the mosaic disease. Preliminary 

 attempts to transmit the disease to seedlings by juice inoculation have 

 been unsuccessful. 



Crown rot or root rot, caused probably by Rhizoctonia, was noted 

 in a few fields. A Fusarium was also noted in association with some 

 of these rots. One scab lesion was noted. Considerable drouth injury 

 as evidenced by a general premature death of the older leaves was noted 

 in certain fields. In one field deep soil cracks were abundant and in 

 cases where a crack occurred along the same plane as that occupied by 

 the two rows of lateral roots on a beet tap root the effect was often 

 fatal to the plant. 



Blackberry. — Anthracnose, caused by Plectodiscella venefa, was 

 noted causing yellowish, greasy, translucent leaf lesions on April 18 

 near Lafayette, and the fungus was cultured from these lesions. A 

 similar leaf-spot and a subsequent shot hole effect were found on wild 

 blackberries in Lawrence County on April 29. Rust occurs to a con- 

 siderable extent on wild blackberries and often is destructive in plant- 

 ings. One complaint of rust injury was received from Vanderburgh 

 County. Mains reports that the long-cycled Gymnoconia interstitialis 

 occurs in northern Indiana and the short-cycled Ktinkelia nitens in 

 southern Indiana. In the vicinity of Lafayette both species occur and 

 are indistinguishable macroscopically. Crown gall was found on the 

 cut ends of root segments of the Taylor variety imported from Ohio for 

 use in an experimental planting at Lafayette. Sooty blotch and fly 

 speck (Leptothyriuvi ponii or Gloeodes pomigena [7]) has been noted 

 on the canes of both cultivated and wild plants. Leaf-spot, due to 

 Mycosphaerella ruhi, was found prevalent at Lafayette. 



Cabbage. — Yellows, due to Fusarium conglutinuns, continued to be 

 the worst cabbage disease in Indiana and was severe on the early crop 

 during the hot weather of June and July. The disease was reported 

 from Lake, Marshall, White, Tippecanoe, Clinton, Jay, Marion, Knox, 

 Jackson, Jefferson, Clark, Floyd and Vanderburgh counties, and is ap- 

 parently well established in all parts of the state. The yellows-re- 

 sistant Wisconsin Hollander is coming into more general use as a late 

 variety in Lake County. Marion County growers are trying the re- 

 sistant All-Seasons variety and are also developing resistant strains of 

 earlier varieties. 



Owing, perhaps, to the very wet spring, black leg, caused by 

 Phonia lingam, was very prevalent and destructive among young plants 

 recently transplanted. Specimens of diseased transplants were received 

 from Miami County in May and on May 20, black leg was found killing 

 many plants in recently planted fields near Indianapolis. In many cases 

 new secondaiy roots were being produced above the cankers. This dis- 

 ease is primarily a seed-bed trouble and the bulk of infection occurs 

 therein. It is disseminated with diseased transplants and striking evi- 

 dence of its introduction into Indiana market garden sections was af- 



