made September 18th at Greenfield showed fruit infection ranging from 45 
to 72%, at Knightstown, 75 to 86%, and at Mooresville, 77 to 96%. Petiole 
infection ranged between 57 and 74% at Mooresville. In the Greenfield 
orchard blotch was found on two young Grimes trees that were overhung 
by diseased Greenings, indicative of drip infection. Good control of 
blotch on the fruit was secured by the Bordeaux sprays, but no success was 
had with the concentrated lime sulphur dormant spray. 
Scab, caused by Venturia inaequalis. is the most important apple dis- 
ease in Indiana and seemed to be equally prevalent throughout the state. 
Because of the wet weather in May, scab was particularly severe on the 
foliage and blossoms. It was not, however, as severe on the fruit as the 
early infection led one to expect. However, it was generally prevalent on 
fruit in the northern part of the state. H. H. Swaim reports difficulty in 
finding scab-free fruit in a sprayed orchard near South Bend. Cullinan 
found in an experimental orchard at Peru, practically 100% defoliation 
and no fruit in unsprayed check plots as a result of scab. He further re- 
ports that the Ben Davis variety suffered severely from this disease. Burk- 
holder found scab worse this year in southern Indiana than he had _ pre- 
viously noted. Owing to the very early and vigorous start made by the 
disease, spray control was less successful than usual. 
Taking the state as a whole, black rot caused by Sphaeropsis malorum 
was by far the most prevalent disease. The frog-eye leaf-spot was particu- 
larly ubiquitous and destructive, and the blossom-end type of fruit rot was 
rather common on certain varieties. The latter condition was noticed in 
an orchard at Knightstown, June 17th., and on Summer Rambo in an or- 
chard near Bedford, July 15th. Cullinan found black rot very severe on 
Ben Davis apples in an orchard at Bicknell in August in the shape of a 
blossom-end rot associated with a heavy San Jose scale infestation of the 
calyx ends which had caused cracking of the fruit. While this disease is 
usually worse on old unpruned trees, it was found very severe in a large 
orchard of young trees near Paoli, May 28th., resulting in a noticeable yel- 
lowing of the foliage. Considerable defoliation was caused by this disease 
and in cases carefully noted it was found that five or six lesions were suifi- 
cient to cause the leaf to drop. 
Early in the season, fire blight caused by Bacillus amylovorus occasion- 
ally was noted to be severe in apple trees, particularly those near diseased 
pear trees. <A striking example of this was noted near Knightstown, June 
17th., where there was a row of badly blighted pear trees along one side of 
an orchard. The apple trees along this side were badly blighted, while 
farther over there was not much blight to be found. In a dooryard in 
Orleans, a case was observed where ;:there was considerable blight on one 
side of an apple tree, the side adjoining a blighted pear tree. In a small 
orchard of young trees near Indianapolis, the extreme susceptibility of the 
Winter Banana variety to fire blight was clearly indicated. 
Sooty blotch caused by Leptothyriwn pomi occurred rather commonly 
in the central and southern parts of the state. Considerable sooty blotch 
was noted on the fruit from an orchard near Mooresville. 
