. Bulletin of the Department of Agriculture. Agriculture. j&n&j-<~ BULLETIN No. 708 Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief. ^^"^J-c Washington, D. C. PROFESSIONAL PAPER September 18, 1918 SHUCK PROTECTION FOR EAR CORN. By C. H. Kyle, Assistant Physiologist, Office of ('brn Investigations. CONTENTS. Introduction Relation of shuck characters to insect infes- tation Field investigations Storage investigations Laboratory investigations Results of investigations in 1916 Shuck extension as a preventive of worm damage Relation of shuck covering to mol
. Bulletin of the Department of Agriculture. Agriculture. j&n&j-<~ BULLETIN No. 708 Contribution from the Bureau of Plant Industry WM. A. TAYLOR, Chief. ^^"^J-c Washington, D. C. PROFESSIONAL PAPER September 18, 1918 SHUCK PROTECTION FOR EAR CORN. By C. H. Kyle, Assistant Physiologist, Office of ('brn Investigations. CONTENTS. Introduction Relation of shuck characters to insect infes- tation Field investigations Storage investigations Laboratory investigations Results of investigations in 1916 Shuck extension as a preventive of worm damage Relation of shuck covering to mold and dis- coloration General value of a good shuck covering Advantages in the field Advantages in storage Advantages in market quality Relation of increased shuck protection to the cost of shucking The production of better shuck Summary Page. 12'. 12: 13 14 14 L5 10 INTRODUCTION. Most corn growers fail to realize that by improving the shuck cov- ering on their corn by selection they may reduce the amount of damage done to the grain. Growers generally consider nothing but the ears and kernels when selecting seed. In weevil-infested sec- tions in particular, variation in the damage of ears is frequently observed, but if the matter is considered the cause is usually attributed to variation in the hardness of the grain. Weevils attack corn of all degrees of hardness, and their progress in consuming the hard corn is only slower than that in the soft corn. Some observers have con- cluded that since weevils are able to eat the hardest corn, they would also cut their way through the most resistant shucks in order to feed upon the grain, if sufficiently urged by hunger. Others have observed that earworms may cut holes through a large percentage of the pro- tecting shucks and that weevils will enter through these holes, and they have concluded from this that shuck covering can not be made a practicable means of protection. Then, too, there is a senti- ment on the part of s
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