Experiments were conducted in the field from 1990 to 1992 to evaluate the influence of two isolates of the fungal antagonist Gliocladium virens and two delivery systems on the biological control of southern blight caused by Sclerotium rolfsii on processing carrot and tomato. Two isolates of G. virenq (GL-3 and GL-21) in either a bran prill or vermiculite bran formulation, nonamended control formulations, and the fungicides PCNB (Terrachlor 75WP) or flutolanil (Moncut 50WP) were applied to separate plots infested with S. rolfsii arranged in a randomized complete block design. The incidence of southern blight in carrot was consistently reduced over 3 yr by both isolates of G. virens in the bran prill formulation when the antagonist was cultivated into soil on both sides of the row
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Jean B. Ristaino (1994) studied this question.