Abstract
This paper is a report of some of the progress made on three seasons of study pertaining to the relation of the planting date of corn to corn borer ( Pyrausta nubilalis Hubn.) infestations and populations. Other conditions being equal, greatly reduced infestations and subsequent borer populations were evident in the later plantings. Discussions of some of the reasons for this are included, principally as regards the effect of the height. of corn on egg deposition and the effect of the required length of the growing period of varieties on larval survival.
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