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 County 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 Plasmodiophora brassicae 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 Phoma lingam was found in a few fields near High- 
land, but was not very destructive. Black rot due to Pseudomonas cam- 
pestris was not noted. Black leaf-spot caused by Alternaria brassicae 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 libertiana. The same fungus was observed earlier in the season 
on seedlings in a greenhouse. Likewise there was noted a damping-off 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 tracheiphilus. This caused the 
death of a small percentage of the plants early 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 wilt were found. 
Leaf blight or “rust” due to Alternaria brassicae var. nigresccons was very 
generally prevalent in all fields examined. It was severe in the Decker 
region, even as early as June 26th., and by July 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 disease reduces the yield 
very materially. 
White porcelain-like areas due to sunscald were found on the upper sur- 
faces of melons in the field, July 24th. In the packing shed, melons were dis- 
