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Twig lesions of the scab disease caused by Cladosporium carpophilum 
were found very common on the 1918 wood and were noted in four counties. 
In the Knox County crop. fruit infection was rather abundant but occurred 
too late to be of economic importance except as a minor blemish. 
A root rot caused by Armillaria mellea was found in Brown County. 
The severe winter injury of 1917-18 is conspicuous in the peach orchards 
near Paoli, which were rendered practically worthless. Frost injury to 
the blossoms reduced the Indiana crop severely this season. 
PEAR. 
Fire blight caused by Bacillus amylovorus was very severe early in the 
summer, especially in the southern half of the state. VPipal reports that fire 
blight is ruining orchards in Tippecanoe and Gibson counties. Some of 
these have yielded no fruit for several years. 
Leaf-spot caused by Septoria pyricola is common on dooryard trees. 
Scab caused by Venturia pyrina occurred locally. 
PEPPER. 
Sunseald of the green fruits was undoubtedly the cause of the greatest 
losses in this crop. The scalded areas are readily invaded by rot-producing 
fungi. 
Mosaic was rather common late in the season. 
PLUM. 
Brown rot caused by Sclerotinia cinerea was severe on farm yard trees 
in general. Twig blight due to the same fungus was noted also. 
The leaf-spot caused by Bacterium pruni was noted in Blackford, Floyd, 
and Marshall counties. It was found quite serious near Plymouth, June 3rd. 
Black knot due to Plowrightia morbosa was found in White County and 
Pipal reports a case in an orchard in Hendricks County in which every tree 
is being killed by black knot. 
Twig injury caused by H.wroascus pruni was very severe in an orchard 
in Hancock County early in the season. 
Frost injury to the blossoms reduced the yield. Russet and cracking of 
the fruit due to frost injury was noted at Plymouth, June 3rd. 
POTATO. 
The hot dry summer season was very unfavorable to the potato crop. The 
vines as a rule remained undersized, the leaves were small with a _ ten- 
deney to roll upwards, and the yield was low. 
The weather conditions which prevailed this season were especially con- 
ducive to the non-parasitic disease known as tip-burn, which was prevalent 
throughout both the early and late crops. Undoubtedly soil and seed stock 
have some influence on the severity of this disease. The relative importance 
of the leaf-hopper as a causal agent in connection with tip-burn is still in 
question. C. T. Gregory and F. C. Gaylord found that a combined spray of 
