PbS RA TONGS: 
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PLATES. 
Prate J. The ‘‘rough-bark” disease on apple branches and leaves, Fig. 1.— 
A branch of a Yellow Newtown apple tree, showing the earlier 
stages of the disease. Fig. 2.—A Yellow Newtown apple branch 
which shows the disease in its later stages. Fig. 3.—Apple leaves 
showing pycnidia of the fungus on areas which were first burned 
Page. 
with a hot needle and then sprayed with spores.... .... Frontispiece. 
II. Fig. 1.—Branches of Yellow Newtown apple trees, showing various 
stages of the ‘‘rough-bark” disease. Fig. 2.—Yellow Newtown 
apple twigs, showing the ‘‘rough-bark” disease produced by arti- 
ficial inoculation with spores of Phomopsis mali................ 
III. Fig. 1—yYork Imperial apple leaves inoculated with Phomopsis 
mali through scorched areas. Fig. 2.—Growth of Phomopsis 
mali on corn meal, showing ropelike masses of spores. Fig. 3.— 
York Imperial apple, about one-third grown, showing rot pro- 
duced by artificial inoculation with the fungus, which is fruiting 
onthe decayed spots’. 42225 23 Ane see caer ee ee eee 
TEXT FIGURES. 
Fie. 1. Section through a pycnidium of Phomopsis mali grown on corn meal.... 
2. The two forms of spores of Phomopsis mali produced in one pycnidium. 
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