140 



Copenhagen were failures because of yellows and market growers about 

 Shelbyville reported that yellows was forcing them entirely out of the cab- 

 bage industry. In the Lake Countj' truck region near Highland, yellows 

 was found to a greater or less extent in a rather large number of fields of 

 kraut cabbage examined and no fields were found to be free from it. Yellows 

 is frequently present in seed beds and the use of diseased transplants is a 

 prolific means of dissemination of this disease. Especially is this the 

 case when one grower secures plants grown by another, a practice commonly 

 indulged in. 



Clubroot caused by Phiamodioiniora hnixsicae was found in several (5) 

 fields near Highland in Lake County and where it occurs a heavy reduction 

 in yield results. In one instance a grower had knowingly introduced both 

 yellows and club root into clean soil with his purchased transplants. 



Black-leg caused by Phomn lingam was found in a few fields near High- 

 land, tint was not very destructive. Black rot due to Pseudonwnas cam- 

 ix'stris was not noted. Black leaf-spot caused liy AJtcniaria bra^sicae was 

 noted in Lake County. In the early crop in the Indianapolis market gard- 

 ens there was some loss due to a rot of the stem and leaf bases caused by 

 Sclerotinia lihertiaHfi. The same fungus was observed earlier in the season 

 on seedlings in a greenhouse. Likewise there w'as noted a damping-ofC of 

 cabbage seedlings due to Rhizoctonia. 



A non-parasitic tip-burn of the leaves was found in Lake County, in 

 September, which was not confined to the exterior leaves, but occurred 

 also on interior leaves as well. This disease caused a considerable loss. 

 Affected heads are unmarketable because the killed leaf margins almost 

 invariably become infected with rot-producing fungi such as Botrytis. 



Cantaloupe. 



Fields were examined in Knox, Jackson and Marion Counties. The most 

 important disease was wilt due to Bacillus iracheiphUus. This caused the 

 death of a small percentage of the plants eai'ly in the season. It was found 

 actively spreading June 26, and July 24 its ravages were attested by numer- 

 ous blanks and dead plants. It was not serious in the Indianapolis market 

 gardens but was generally recognized at Decker and Vallonia as the worst 

 cantaloupe disease. No indications of Fusarium wait were found. 



Leaf blight or "rusf due to Altcnunhi hnissirac var. nhjroifinti was very 

 generally prevalent in all fields examined. It was severe in the Decker 

 region, even as early as June 2()th., and by Jul.v 24th, was killing the older 

 foliage extensively. On many of the fields in this district cantaloupes 

 have been grown for the last 20 to 30 years and the severity of leaf blight 

 may be largely due to this lack of crop rotation. 



The mosaic disease, characterized by dwarfed vines and mottled leaves 

 was found in several fields in Knox County. This di.sease reduces the yield 

 very materially. 



White porcelain-like areas due to sunscald were found on the upi>er sur- 

 faces of melons in the field, July 24th. In the packing shed, melons were dis- 



