588 
Journal of Agricultural Research 
Vol. XXIII, No. 
On the other hand, all of those in the diseased group remained stationary 
in height for a period of io to 15 days. At the end of that time some of 
the diseased plants began growing and continued to progress at about 
;-:--- 
O /O 20 SO <40 60 60 70 SO 
Fig. x.—Growth curves and yield of diseased (No. 67) and healthy (No. 68) com transplants. During 
the first week there was an actual decrease in height of the diseased transplant on account of the b lightin g 
of the leaves. During the following three weeks the diseased plant recovered somewhat from the severe 
attack of the root and stalk rot pathogenes and grew at about the same rate as the healthy plant, but 
after that, it failed to make as rapid progress. The diseased transplant required about xo days longer 
to attain its max im u m circumference. It failed to produce any grain, whereas the healthy transplant 
produced the good ear shown. 
HKWRtQHr 
?/? 
/££/// 
7 ? 9 tt£Z/A/& 
'£/GHTO£ 0 /££ffS£D 
S£££>£/A/G. 
AfO.53— - C//?Ct//V££££We£OF 
0/6&9&£0 0££&l/A/G. 
£/?££ 6££/U./A/G. 
— —-C/£CM££fi£WC£ 0 £ 
ovianmc 0/S£/?S£-£/?££ 0££0L/H& 
O 10 20 60 40 60 60 70 60 SO 
Fio. a.—Growth curves and yield of diseased (No. 53) and healthy (No. 54) com transplants. The dis¬ 
eased transplant failed to make any progress in height during the first week or 10 days, after which it 
grew at a rate parallel with that of the healthy transplant. The diseased transplant was considerably 
later in attaining its maximum stalk circumference, In tasseling, and in silking and produced a consid¬ 
erably smaller ear. 
the same rate as the healthy plants with which they were compared 
(fig. 1 and 2). Some of the diseased plants finally attained a height 
equal to that of the healthy plants (fig. 3) but they were later in tasseling 
