Effect of iprodione fungicide application on deterioration rate of stored shelled corn

The fungicide iprodione was applied with two different amounts of water car rier, 3.29 and 5.48 mL/kg wet corn, to study its effect on the allowable st orage time (time to lose 0.5% of original dry matter) for shelled corn (Zea mays) at 18 and 22% moisture (wet basis) and 20 degrees C. Allowable stora ge time was determined by measuring the amount of carbon dioxide produced b y corn samples and by using a carbohydrate respiration model to calculate d ry matter loss. Performance of the fungicide was slightly better with the s maller amount of water carrier, but the difference in performance for the t wo levels of water carrier was not significant (p < 0.05). With the smaller amount of water carrier, the fungicide increased the allowable storage tim e about 45% for 18% moisture corn and about 16% for 22% moisture corn. At t he end of the tests, the 22% moisture corn had higher levels of total damag ed kernels than did the 18% moisture corn for all fungicide treatments.