151 
Anthracnose caused by Colletotrichum phomoides was noted on the ripe 
fruit at an Indianapolis canning factory. 
The mosaic disease became generally prevalent throughout central In- 
diana during the last half of the season. The disease was not noted to any 
extent in the Paoli region nor in Lake County, but was found in Knox, 
Marion, Clinton and Tippecanoe counties. It also occurred very generally 
in the greenhouses early in the summer and has already (November) 
become epidemic in the fall crop in one house. Most fields showed from 50 
to 100% infection. Except for the low percentage of fern-leaf plants which 
yield no marketable fruit whatever, the effect of the disease upon yield 
is not known. The attack seemed to have occurred too late to noticeably 
reduce the yield this season. However, the disease has extremely destruct- 
ive possibilities and should be considered a distinct danger to the tomato 
industry. No resistant strains or varieties have been found. 
The non-parasitic blossom-end rot was prevalent in the greenhouse sum- 
mer crop and in the first fruit set in the canning crop, especially in the 
Paoli region. The non-parasitic injury is almost invariably invaded by some 
rot-producing fungus, such as Alternaria or Fusarium, so that affected 
fruits are a total loss. A very considerable reduction in yield may be at- 
tributed to this trouble. In a series of fertilizer plot tests at Paoli, no 
difference was noted in the incidence of blossom-end rot. 
In the field crop later in the season, the non-parasitic growth cracks were 
very prevalent and were responsible for a large proportion of the fruit 
rot since these cracks are subject to invasion by rot-producing organisms. 
While the loss due to growth crack invasion was considerable this year, 
especially in canning stock shipped by rail, it was not nearly as heavy as 
in years which are characterized by frequent rains during the picking 
season. 
Sunseald was rather common in the market garden crop which was badly 
affected with leaf-spot and to some extent in the canning crop as a result 
of the hot weather early in September. Sunscald also affords an avenue of 
invasion for rot-producing fungi. 
Catface, a disfiguration of the blossom-end of the fruit, was very common 
in the canning crop. This does not predispose the fruit to rot. <A very 
shallow, brown, lace-like blemish on mature fruit, called “blotch” because 
of the shape of the lesion, was found rather commonly. 
Among locally grown fruit on the sorting belts in a canning factory at 
Indianapolis, September 50th, 10% showed infected growth cracks, 5%- 
bacterial spot, 5%-blotch, 83%-sunscald, 1%-catface, 0.5%-anthracnose. 
Hollow stem was of common occurrence this year where spindling trans- 
plants were used. Hollow stem was also caused by the extreme drouth, 
the moisture being absorbed from the pith to supply the needs of the green 
tissue. A conspicuous upward curling of the leaves and premature death of 
the older leaves among garden tomatoes has also been attributed to drouth. 
Nematode root infestation was found in certain greenhouses. Affected 
1Coons, G. H. Michigan plant disease survey for 1917. Mich. Acad. Sci. 20th, 
Am. Rep. 446. 1918. 
