Soil fumigation with methyl bromide-33% chloropicrin was the superior treatment for controlling black root rot [Fusarium oxysporum] of loblolly pine (P. taeda) seedlings. The severity of root rot was reduced significantly when soil was fumigated with DD-MENCS [dichloropropene-dichloropropane + methyl isothiocyanate] or drenched with benomyl but was not reduced when soil was drenched with thiabendazole. Both benomyl and thiabendazole soil drenches reduced ectomycorrhizal development, but neither soil fumigation treatment affected it.