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Control of Verticillium Wilt of Cotton by Spraying Foliage with Benomyl and Thiabendazole Solubilized with Hydrochloric Acid. H. Buchenauer, Department of Plant Pathology, University of California, Riverside 92502; D. C. Erwin, Department of Plant Pathology, University of California, Riverside 92502. Phytopathology 61:433-434. DOI: 10.1094/Phyto-61-433.

When HCl solutions of 2-(4-thiazolyl) benzimidazole (TBZ) and methyl 1-(butylcarbamoyl)-2-benzimidazolecarbamate (benomyl) (pH 2.7 and 1.5, respectively), were sprayed twice on foliage of cotton plants at concn of 2,500-10,000 ppm, Verticillium wilt was prevented following subsequent stem inoculation. Neither solution was phytotoxic. Both solutions also induced curative effects when sprayed on inoculated plants showing initial symptoms of Verticillium wilt. Thiabendazole and methyl 2-benzimidazolecarbamate (hydrolysis product of benomyl) were detected by bioassay and chemical analysis in xylem tissue and in nontreated stems and leaves above the place of application.

Additional keywords: Verticillium albo-atrum, translocation, systemic fungicide, Gossypium hirsutum.