Tebuconazole, an ergosterol biosynthesis inhibitor, has a high level of activity against Sclerotium rolfsii and Rhizoctonia solani in vitro. Mean ED 50 values for inhibition of mycelial growth of two isolates each of R, solani anastomosis group 4 (AG-4) and S. rolfsii were 0.17 and 0.08 μg/ml, respectively, for tebuconazole, compared with 24.3 and 3.9 μg/ml, respectively, for the pentachloronitrobenzene (PCNB) standard. The ED 50 values for the inhibition of sclerotia formation by S. rolfsii were 0.13 and 4.99 μg/ml for tebuconazole and PCNB (...)
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T. B. Brenneman (1991) studied this question.