Abstract
The new systemic fungicide N,N'-bis-(1-formamido-2,2,2-trichloroethyl)-piperazine (CELA W 524) was shown to display a moderate to distinct fungitoxic activity in vitro towards several pathogenic and non-pathogenic fungi. Depending on the inert ingredients present2, the available formulations proved to be either rather phytotoxic or virtually non-phytotoxic. Pre-infectional spraying with the non-phytotoxic formulation provided complete protection of barley, bean, cucumber, pea and tomato plants against barley powdery mildew, bean rust, cucumber powdery mildew and cucumber scab, pea powdery mildew and tomato leaf mould, respectively. some suppression of disease symptoms —although only at high concentrations of CELA W 524 — was observed in the case of leaf spot in pea plants. Upon post-infectional treatment disease control was less pronounced, although powdery mildew diseases and tomato leaf mould were effectively suppressed. When applied via the roots CELA W 524 proved to be systemically active, successfully protecting barley plants against powdery mildew, and cucumber plants against powdery mildew and cucumber scab.
Samenvatting
Het nieuwe systemische fungicide CELA W 524 (C. H. Boehringer Sohn, Ingelheim am Rhein, Duitsland) bleek een matige tot duidelijke fungitoxische werking in vitro te vertonen tegenover verschillende pathogene en niet-pathogene schimmels. Eén van de beschikbare formuleringen bleek vrij sterk fytotoxisch, de andere was nagenoeg niet fytotoxisch. Bespuiting vóór inoculatie met de niet-fytotoxische formulering resulteerde in volledige bescherming van gerst, bonen, komkommers, erwten en tomaten tegen respectievelijk gerstemeeldauw, boneroest, komkommermeeldauw en vruchtvuur, erwtemeeldauw en bladvlekkenziekte bij tomaat. Enige onderdrukking van ziektesymptomen trad ook op bij erwten, geïnoculeerd metAscochyta pisi, tenminste, wanneer hoge concentraties van CELA W 524 werden gebruikt. Bij bespuiting na inoculatie was het effect geringer, hoewel meeldauwziekten en bladvlekkenziekte bij tomaat toch doeltreffend bestreden werden. Toegediend via de wortels bleek CELA W 524 systemisch actief; het beschermde aldus gerst tegen meeldauw en komkommers tegen meeldauw en vruchtvuur.
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References
Fuchs, A., Viets-Verweij, M., Vörös, J., & Vries, F. W. de, 1970. Some observations on activity and metabolism of a new systemic fungicide, N,N'-bis-(1-formamido-2,2,2-trichloroethyl)piperazine (CELA W 524). Proc. Conf. biochem. ecol. Aspects Plant-Parasite Relations, Budapest, Hungary (to be published).
Homans, A. L. & Fuchs, A., 1970. Direct bioautography on thin-layer chromatograms as a method for detecting fungitoxic substances. J. Chromatog. 51:327–329.
Schicke, P. & Veen, K. H., 1969. A new systemic, CELA W 524 (N,N'-bis(1-formamido-2,2,2-trichloroethyl)-piperazine) with action against powdery mildew, rust and apple scab. Proc. 5th Br. Insectic. Fungic. Conf., Brighton, England: 569–575.
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Fuchs, A., Doma, S. & Vörös, J. Laboratory and greenhouse evaluation of a new systemic fungicide, N,N'-bis-(1-formamido-2,2,2-trichloroethyl)-piperazine (CELA W 524). Netherlands Journal of Plant Pathology 77, 42–54 (1971). https://doi.org/10.1007/BF01981522
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DOI: https://doi.org/10.1007/BF01981522