any tendency towards more frequent infection of ears exposed through incomplete husk 
coverage. But it can hardly be doubted that such a tendency does exist when, with 
reasonable care practiced in the classification of ears, an excess of open infected 
Table 13,-- Relation of smut infected ears to husk coverage, 
1931-19385, 
ee eee eee ee ee - a 
a a ae — a SS eee SST 
1 (eR er ase 
Number of infected ae ee, of infected ears] open, in 
Year Open | Covered Open | Covered percent 
1931 147 22 87.0 135.0 74.0 
1932 60 4 95.7 6.5 87.4 
1933 103 10 Gilet 8.9 8208 
1934 262 43 85.9 14,1 71.8 
1935 2l0 SORPU ON, 92.9 ted 85,8 
Average 90,1 9.9 80.2 
4 
ee ES TT TT A LS TTT SLT = 
over closed infected ears is found, ranging in different years from 71.8 to 87.4 
percent and averaging annually 80.2 percent, 
The assortment with respect to husk coverage of the Diplodia rotted ears 
found each year is shown in Table 14, In every year a greater number fell in the 
Table 14,.--— Relation of Diplodia rot to husk coverage, 
1931-1935, 
— A A TT A I 
EE OE Sh Tw ak Rann RN ERE 
Excess of 
Number of rotted ears! Percent of rotted ears} open, in 
Year ;} Open =! Covered ° Open __ i Covered | percent 
1931 OR ie ABW. «\ BBg? ~ 10.4 
1932 a 54 a NS ~ 80,0 
1933 103 | 133 45.6 | 56.4 w Ted 
1934 67 121 3546 | Ged - 28,8 
1935 Boat 38 rake yee 62.3 - 24.6 
} 
Average _ | —- 388 _ 61.2 | = 22,4 
A Re NA —— ee ee 
covered than in the open class, and for the 5 years concerned the open infected ears 
averaged 22.4 percent fewer annually than the covered infected ears. This negative 
