F IELD-SHELLED corn of high moisture presents handling and storage problems. While an increasing a m o u n t of corn for livestock feed is being stored wet b y ensiling or chemical t r ea tment , the load on convent ional drying and handling equ ipment is often excessive at the peak of harvest. The heavy load may cause delays during which wet corn can go ou t of condi t ion. Aera t ion with refrigerated or natural air has been used for t empora ry or ex tended storage of high moisture corn, and to lessen the peak load on drying equipment . It is k n o w n tha t high tempera tures and moisture contents greatly shorten the safe storage t ime for corn (U.S. Depa r tmen t of Agriculture, 1968) , bu t the effects of short t e rm exposure to adverse condit ions such as when drying or cooling is delayed, have no t been adequate ly studied. We investigated mold growth and o ther changes tha t occurred during a n d after delays in the start of cooling warm, moist corn and during cont inuous o u t d o o r aerat ion of corn.