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A New Systemic Fungicide Against the Downy Mildew Disease of Cucumbers. Yigal Cohen, Associate professor, Department of Life Sciences Bar-Ilan University, Ramat-Gan, Israel; Phytopathology 69:433-436. Accepted for publication 10 August 1978. Copyright 1979 The American Phytopathological Society. DOI: 10.1094/Phyto-69-433.

Propyl-(3-[dimethylamino]-propyl)carbamate-monohydrochloride (SN66752, propamocarb, a new compound by Schering AG) and prothiocarb (SN41703) exhibited systemic antifungal activity against Pseudoperonospora cubensis, the cause of downy mildew disease of cucumbers. Aqueous solutions of the chemicals applied as soil drenches to potted cucumbers protected them from the mildew for a period of 25 days. The fungicides were highly toxic to sporangia of the pathogen, induced an alteration in symptoms of the disease, and inhibited sporulation of the fungus on developed lesions.

Additional keywords: Cucumis sativus.