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Factors Affecting Butylate Injury to Corn

Injury to corn (Zea mays L.) hybrids from butylate (S-ethyl diisobutylthiocarbamate) was investigated as a function of planting depth, soil pH, and temperature. Field and growth chamber studies indicated that the potential for butylate injury increased with increasing planting depth regardless of hybrid. Greenhouse and growth chamber experiments suggested that as soil pH decreased butylate injury increased, depending upon the hybrid. Butylate injury was also a differential response among hybrids, depending on temperature. Certain hybrids may be injured more at higher temperatures and other hybrids more at lower temperatures. Butylate injury to corn, therefore, appears to be due to a three-way interaction, stress x hybrid X butylate.