Laboratory and Field Tests with Triazole Fungicides to Control Phymatotrichum Root Rot of Cotton

J.L. Riggs and S.D. Lyda


 
ABSTRACT

Growth of Phymatotrichum ominvorum was inhibited more than 85% by all triazole fungicides tested at 1 ppm in a potato dextrose agar medium except with etaconazole and myclobutanil. Three fungicides (flusilazole, penconazole and triadimenol) inhibited sclerotial production at least 99% in soil treated with 10 ppm of the fungicide. Flusilazole inhibited sclerotial germination at 1 ppm. No significant differences in disease incidence were found in field tests with infurrow applications of granular, triazole fungicides. Apparent benefits of fungicides were observed in localized spots where disease incidence was high in control plots and considerably lower in the treated plots.



Reprinted from 1988 Proceedings: Beltwide Cotton Production Research Conferences pp. 45 - 48
©National Cotton Council, Memphis TN

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Document last modified Sunday, Dec 6 1998