Control of the Root, Stalk, and Ear Rot Diseases of Corn Page: 4
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Farmers' Bulletin 1176.
The most careful estimates possible indicate that these diseases
cause greater losses in this country than any others affecting corn.
In fact, it is believed that they cause greater damage than all the
other corn diseases, smut, rust, brown-spot, etc., combined. The
losses in 1919 were conservatively estimated at 125,175.000 bushels,
or 4 per cent of the total crop.
The actual losses caused bly these rots in the corn-elt States can
not beo accurately estimated. If it were ipossille to (cldtermino the
losses caused by poor stands resulting fiom planting infected soeld
and also the losses due to the stunting of the growth of the many
remaining pllants, with the consequent reduced size of ears, it is
believedd that the total would 1)o fully 10 per
cent and perhaps more.
Root-rot of corn was first reported about 15
years ago from southern Ohio, where it was
losses. Later it was
reported from Iowa,
Missouri, and Min-
nesota. During the
last two years (1918-
19) it has been found
in all of the corn-
While these dis-
eases have beenfound
t.to some extent prac-
tically wherever corn
is grown in this coun-
FIG. 1.-Diseased corn seedling, showing blackened roots and kernel hey
and discolored inner tissues of stem. try, t
most destructive in
the corn belt. It is in this section that the most extensive investigations
have been carried on, particularly in Illinois and Indiana, and it is to
this section thatstatements in this bulletin are most directly applicable.
In the Southern States the frequent return of corn to the. same
field in the rotation, and the less common use of the germination
test both tend to make the disease abundant.
These rot diseases cause the heaviest losses in dent corn, because this
is the commercial corn crop of this country. Sweet corn and flour corn,
however, seem to be more severely affected. Not so much disease has
been found in flint corn or pop corn where these are commercially grown,
this being due, perhaps, in part to less favorable climatic conditions.
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Holbert, J. R. & Hoffer, G. N. (George Nissley), 1887-. Control of the Root, Stalk, and Ear Rot Diseases of Corn, pamphlet, 1920; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc86031/m1/4/: accessed August 21, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.