Liquid culture of Diplodia maydis.

Diplodia maydis, a Zea mays L. stalk rot causing fungus, was grown in Czapek-Dox broth and modifications of Fries liquid media using combinations of 1% cellulose, 1% sucrose and ammonium or nitrate-nitrogen. Conditions are defined to yield consistently maximum mycelial dry weight in two days in contrast to the usually reported five-day incubation period.