Synergistic Effect of Ethazole and Pentachloronitrobenzene on Inhibition of Growth and Reproduction of Pythium aphanidermatum. M. K. Rahimian, Former Graduate Student, Department of Plant Protection, College of Agriculture, University of Shiraz, Shiraz, Iran. Z. Banihashemi, Professor, Department of Plant Protection, College of Agriculture, University of Shiraz, Shiraz, Iran. Plant Dis. 66:26-27. Accepted for publication 29 January 1981. Copyright 1982 American Phytopathological Society. DOI: 10.1094/PD-66-26.

Quintozene (a mixture of ethazole and pentachloronitrobenzene [PCNB]) prevented mycelial growth, oospore germination, sporangium formation, and zoospore production in Pythium aphanidermatum. Ethazole alone was less effective, and PCNB had no effect. A 1:5 mixture of ethazole and PCNB at ≥50 ppm (w/w, a.i.) inhibited mycelial growth similar to the inhibition produced by quintozene alone.

Keyword(s): cucurbit root rot and damping-off, fungicide.