Laboratory and Glasshouse Studies of the Activity of Carboxamide Derivatives Against Rhizoctonia solani in Cotton. J. L. Huppatz, Division of Plant Industry, PO Box 1600, Canberra City, Australia. J. N. Phillips, and B. Witrzens, CSIRO, Division of Plant Industry, PO Box 1600, Canberra City, Australia. Plant Dis. 67:45-47. Accepted for publication 17 May 1982. Copyright 1983 American Phytopathological Society. DOI: 10.1094/PD-67-45.

Carboxin and several of its analogues, including pyracarbolid, fenfuram, methfuroxam, and furmetamid, as well as two experimental pyrazole carboxanilides, have been studied as fungitoxic agents against the soil pathogen Rhizoctonia solani. The activities of these compounds were compared both in vitro on mycelial growth and in vivo against damping-off disease in cotton seedlings grown under glasshouse conditions. Carboxin, methfuroxam, and furmetamid were the more active inhibitors in vitro, whereas furmetamid, the pyrazole derivatives, and carboxin were the more effective compounds in vivo.